If the water reservoir is not detachable—as on a smaller Keurig appliance—allow 5 to 10 seconds here for any descaling ...

When your Keurig boils water, the water steams up into a gas, but hard minerals remain as scale. This is the same whether you're using a Keurig Slim, Keurig 2.0, or any of the best Keurig machines .

Descale your favorite coffee appliance in 30 minutes or less with just some white vinegar and fresh water—plus, a new use for a paper clip ...

Fill the water reservoir halfway with white distilled vinegar. Then, fill the rest with fresh water . This 50/50 solution is strong enough to dissolve mineral deposits but won't damage your machine.