Our own formula · Made by Think Crucial

Electric kettle descaler. 15 descales, 35% citric acid.

White flakes, slow boils, off-tasting water: that's scale on the element. 2 Tbsp, boil, stand 15 to 30 minutes, rinse. $1.53 a descale.

4.9from 11 ratings on Amazon(as of Oct 1, 2026)

Think Crucial descaler — **Fig. 01**16 fl oz bottle

Works withElectric kettles

Breville Smart Kettle
Fellow Stagg EKG and EKG Pro
Cuisinart CPK-17
KitchenAid KEK series
Hamilton Beach
Mueller
COSORI
OXO Brew
Zojirushi

Not sure? See how to use it or email support@thinkcrucial.com.

Shipping
Free U.S. shipping on every order
Dispatch
Ships the same business day when ordered by 2pm ET
Promise
Works with the machine we list, or a refund
Returns
30-day returns on unopened bottles

01Spec sheetFrom the listing

What's in the box.

Exactly what ships, and what it works with.

In the box16 fl oz bottle

1 ×
16 fl oz bottle
35% citric acid concentrate, 15 descales

Works with: Breville Smart Kettle, Fellow Stagg EKG, Cuisinart CPK-17, KitchenAid KEK, Hamilton Beach, Mueller, COSORI, OXO Brew and Zojirushi kettles
Price: 16 fl oz bottle: $22.99
Subscription: None. Buy when you need it
Made by: Think Crucial, our own formula
Ships: Free, from a U.S. warehouse. Same business day when ordered by 2pm ET; arrives in 2–5 business days

02Before you use itElectric kettles

Check your machine.

Made for the Breville Smart Kettle, Fellow Stagg EKG, Cuisinart CPK-17, KitchenAid KEK, Hamilton Beach, Mueller, COSORI, OXO Brew and Zojirushi kettles. If your machine isn't listed, email us before you order.

Breville Smart Kettle
Fellow Stagg EKG and EKG Pro
Cuisinart CPK-17
KitchenAid KEK series
Hamilton Beach
Mueller
COSORI
OXO Brew
Zojirushi

01
Add 2 tablespoons
Add 2 tablespoons to the kettle and fill with water.
02
Boil and stand
Boil, then let it stand 15 to 30 minutes.
03
Rinse
Empty and rinse, then boil one kettle of clean water and pour it out.
04
Still not sure?
Email your machine's model number to support@thinkcrucial.com and we'll tell you whether it works with it. We reply within one business day.

03QuestionsBefore you order

Before you order.

Straight answers. Anything else, email support@thinkcrucial.com.

Q.01How often should I descale?

Every 2 to 4 months.

Q.02How many descales per bottle?

15 per 16 fl oz bottle at the 2-tablespoon dose.

Q.03Which kettles?

Stainless, glass and BPA-free plastic electric kettles, including the brands listed above.

Q.04What if it doesn't work with my machine?

If it doesn't work with the machine we list, email support@thinkcrucial.com and we'll refund it. You don't need to send it back. Unopened bottles can also be returned within 30 days of delivery.

Q.05Is there a subscription?

No. You buy when you need it. Nothing renews and nothing auto-ships.

Q.06When will it arrive?

Free U.S. shipping on every order, from a U.S. warehouse. Ships the same business day when ordered by 2pm ET. Arrives in 2–5 business days.

04Who makes this

We make what we sell.

Think Crucial started in 2007 at a family vacuum repair shop. Today we're a U.S. company in Hollywood, Florida, making descalers and cleaners for the appliances you already own, alongside our aftermarket filters, bags and parts. Each bottle says which machines it's for and how much to use.

Questions before you order? Email support@thinkcrucial.com. We reply within one business day.

Ready to order