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

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Fit guaranteed. If it doesn't fit the model we list, we'll send you a prepaid return label within 30 days of delivery. Details here.

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Our own formula · Made by Think Crucial · Not made by De'Longhi

Made in the USA

Citric acid descaler for De'Longhi coffee and espresso machines.

Measure 2 to 4 tablespoons by water hardness, top up the tank, run the descale cycle. 8 descales per 12 oz bottle, $2.87 a descale.

De'Longhi sells Decalk Care, 500 ml for 5 descales, at $16.95 on sale ($19.95 list): $3.39 a descale. Ours: $2.87 a descale at the recommended dose.Source: delonghi.com, checked October 6, 2026.

4.4from 17 ratings on Amazon(as of Oct 1, 2026)

Think Crucial descaler for the De'Longhi De'Longhi
Your order · De'LonghiIn stock
12 fl oz bottle$2.87 a descale. 8 descales.$22.99

Free U.S. shipping · Ships same business day by 2pm ET

Works with your machine, or your money back.If it doesn't work with the machine we list, email us and we'll refund it. You don't need to send it back.Unopened bottles can be returned within 30 days of delivery. Refund policy
Full product details
Works withDe'Longhi
  • De'Longhi

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 box12 fl oz bottle
  • 1 ×
    12 fl oz bottle
    citric acid concentrate, 8 descales at the recommended dose, up to 12 at light dosing
Works with
De'Longhi coffee and espresso machines with a descale cycle
Price
12 fl oz bottle: $22.99
Subscription
None. Buy when you need it
Made by
Think Crucial, our own formula, made in the USA (not affiliated with De'Longhi)
Ships
Free, from a U.S. warehouse. Same business day when ordered by 2pm ET; arrives in 2–5 business days
02Before you use itDe'Longhi

Check your machine.

Made for the De'Longhi coffee and espresso machines with a descale cycle. If your machine isn't listed, email us before you order.

  • De'Longhi
  1. 01
    Measure

    2 to 4 tablespoons depending on your water hardness.

  2. 02
    Top up and run

    Add it to the water tank, top up with water and run the machine's descale cycle.

  3. 03
    Rinse

    Run at least two full rinse cycles with fresh water.

  4. 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.01Is this made by De'Longhi?
No. It's our own formula, made by Think Crucial. It isn't made, sold or endorsed by De'Longhi, and Think Crucial isn't affiliated with De'Longhi. The brand name only shows what it's for.
Q.02Where is it made?
In the USA. Think Crucial makes it to its own formula.
Q.03How much do I use?
2 to 4 tablespoons depending on water hardness. 8 descales per bottle at the recommended dose, up to 12 at light dosing.
Q.04How does it compare per descale?
De'Longhi's Decalk Care is 5 descales for $16.95 on sale on delonghi.com (October 6, 2026), $3.39 a descale. Ours is $2.87 a descale at 8 per bottle.
Q.05Powder or packets?
Neither. It's a liquid concentrate, so there's nothing to dissolve.
Q.06What 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.07Is there a subscription?
No. You buy when you need it. Nothing renews and nothing auto-ships.
Q.08When 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. Every bottle is made in the USA, and each one 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

Citric acid descaler for De'Longhi coffee and espresso machines

$22.99Free U.S. shipping

Works with the machine we list, or we refund it. No return needed.

Not made by De'Longhi. Think Crucial makes this descaler to its own formula, in the USA. De'Longhi is a trademark of its owner, used here only to describe compatibility. Think Crucial is not affiliated with or endorsed by De'Longhi.

Comparison prices from delonghi.com on October 6, 2026, before any sale or coupon.

© 2026 Crucial Brands Inc., DBA Think Crucial. Hollywood, Florida.