Frequently Asked Questions

Answers to the questions we are asked most about ordering, shipping, returns, fit and the products we make. If your question is not here, email support@thinkcrucial.com and we'll reply within one business day.

• Ordering and shipping
• Returns, refunds and guarantee
• Compatibility and fit
• Our parts and how they are made
• Descalers and cleaners
• Account and contact

Ordering and shipping

Is shipping free?

Yes. Free U.S. shipping on every order. Ships in 1–3 business days. Arrives in 3–7 business days. Free standard shipping covers the 50 US states, including Hawaii, and Puerto Rico, with no minimum order size. See the shipping and returns page for details.

When will my order ship?

Orders ship from our fulfillment center in 1–3 business days, Monday through Friday, and arrive in 3–7 business days. Major holidays are excluded.

Can I get my order faster?

Not right now. Every order ships free at standard speed and arrives in 3–7 business days. If you need it sooner, email support@thinkcrucial.com before you order and we will tell you what is possible.

Do you ship outside the United States?

No. We ship to the 50 US states, Washington, D.C. and Puerto Rico only. We do not currently ship to any other country, including Canada.

How do I track my order?

When your order ships you will receive an email with the tracking number. If you do not see it, check your spam folder, then email support@thinkcrucial.com and we will look it up for you.

Can I change or cancel my order?

Contact us as soon as possible by emailing support@thinkcrucial.com with the subject line Order Cancellation and your order number. Once an order has been processed for shipment we cannot change it, but you can return it under our 30-day return policy.

What payment methods do you accept?

We accept Visa, Mastercard, American Express, Discover and PayPal.

Returns, refunds and guarantee

What is your return policy?

Fit guaranteed: if it doesn't fit the model we list, we send a prepaid return label within 30 days of delivery. Changed your mind? Return it unused, in its original packaging, within 30 days of delivery for a full refund. Return labels are free and prepaid either way. The full policy is on the shipping and returns page.

How do I start a return?

Email support@thinkcrucial.com with your order number and we will send you a free prepaid return label. Pack the item in its original packaging or any plain box, remove any old shipping labels, attach the return label and drop the package at your local post office.

When will I get my refund?

Returns take 1 to 2 weeks to reach us and be processed. Once the refund is issued, allow another 2 to 5 days for it to appear, depending on your card issuer.

What if the part does not fit or does not work?

Fit guaranteed: if it doesn't fit the model we list, we send a prepaid return label within 30 days of delivery. If the part does not work, return it within 30 days at no cost to you. Contact us and we will help you find the right part and process an exchange; the replacement ships free and your refund for the returned item is processed as soon as we receive it. Telling us what went wrong also helps us improve the product.

Compatibility and fit

How do I know a part will fit my machine?

Every product page lists the OEM part numbers and model numbers the part replaces. Match your model number against that list before you order; manufacturers often change part numbers from year to year even when the part stays the same, so the list matters more than the number on your old part. If you are not sure, send the brand and model number to support@thinkcrucial.com and we will match the part for you.

Where do I find my model number?

Most vacuums have a data plate with the model and serial number. On upright vacuums it is usually on the back of the machine behind the hose and attachments; on canister vacuums it is usually on the bottom of the unit. Other appliances typically carry the plate on the base or the back.

Are your parts genuine OEM parts?

No. Think Crucial parts are compatible replacement parts that we engineer to fit and work in a specific appliance, using the original part as the reference. Brand names on our product pages are trademarks of their owners and are used only to say what a part fits; we are not affiliated with or endorsed by those manufacturers.

Will using a compatible part affect my appliance warranty?

It may. Each manufacturer sets its own warranty terms, and using a non-OEM part or descaler can affect coverage. Check your warranty terms if that matters to you.

Our parts and how they are made

Who makes Think Crucial products?

We do, and we do not resell other companies' parts. The vacuum filters, bags, belts, hoses and brushrolls, the air-purifier and humidifier filters, and the AeroGarden-compatible grow bulbs are designed and engineered in the USA and made by Think Crucial. The descalers and cleaners are made in the USA and bottled in Hollywood, Florida. Read more on our about page.

How do you make a compatible part?

We start from the OEM part number and the models it serves, then take the measurements that decide whether a part works: outside dimensions, mounting tabs and seal surfaces, filter media type and depth, belt length and profile, hose diameter and cuff fit. The part is made to those measurements and the fit is checked before it is listed.

How often should I change my vacuum filter?

Follow your vacuum maker's schedule; our product pages state the maker's schedule where available. Many newer vacuums use more than one filter, so check your manual for each location. Browse vacuum filters.

How do I know if my vacuum belt needs replacing?

With use the belt stretches and loses tension on the brush roller, so the roller turns more slowly and leaves debris in the carpet. A belt can look fine and still be slipping, so follow your vacuum maker's schedule; our product pages state the maker's schedule where available. Browse vacuum belts and parts.

How often should I change my air purifier filter?

Follow your air purifier maker's schedule; our product pages state the maker's schedule where available. Main filters and carbon filters can have separate schedules, so check your manual for each. Browse air purifier filters.

Descalers and cleaners

What is in your descalers?

Most of the line is built on food-grade citric acid, which dissolves limescale and rinses out without residue. Some formulas add lactic acid, and formulas for appliances with aluminum boilers or nickel-plated parts are buffered with sodium citrate so they dissolve scale without attacking the metal. There are no phosphates, chlorine bleach, EDTA, borates, fragrance or dye, and most formulas are two to four ingredients. See the full range at cleaners and descalers.

Where are your descalers made?

In the USA. We formulate them ourselves and bottle them in small batches in Hollywood, Florida.

How much descaler do I use?

For an electric kettle, add 2 tablespoons of concentrate, fill with water and boil. For a dishwasher, pour 2 tablespoons into the bottom of the empty tub and run a hot cycle with no detergent. For a coffee maker, add 2 tablespoons for soft water or up to 4 tablespoons for hard water to the reservoir, top up with water and run the descale cycle. Step-by-step guides: kettle, dishwasher, coffee maker.

How often should I descale?

Water hardness sets the schedule. As a baseline, descale a kettle every 2 to 4 months, a dishwasher monthly, and a coffee maker every 1 to 3 months. On hard water move to the short end of each range; on soft or filtered water the long end is enough.

Can I use vinegar or bleach instead?

Vinegar is acetic acid, which is weaker on limescale than citric acid, and its smell and taste linger through several rinses. Bleach does not dissolve scale at all, is not safe in an appliance you drink from, and must never be mixed with an acid descaler.

Account and contact

How do I contact Think Crucial?

Email support@thinkcrucial.com and we'll reply within one business day. Details are on the contact page.

Who is Think Crucial?

Think Crucial is the brand of Crucial Brands Inc., founded in 2007 and based in Hollywood, Florida. We began listing replacement parts online from a family vacuum repair shop and now make our own compatible replacement parts and cleaning concentrates, sold direct on thinkcrucial.com and on Amazon. Read our story.

How is my personal information handled?

We use the information you give us to process your order and, if you opt in, to send our newsletter. We do not sell or trade your personal information to outside parties, and checkout data is transmitted over SSL. The full policy is on the privacy policy page.

Is the website accessible?

We build and test thinkcrucial.com against WCAG 2.1 Level AA. If any part of the site does not work for you, email support@thinkcrucial.com with Disabled Access in the subject line and we will fix it or give you the same information another way. We respond within 2 business days. See our accessibility statement.