Mr. Coffee PR12A ユーザーズマニュアル

Your coffeemaker 

 be cleaned when you begin to notice excessive

steaming or the brewing time increases considerably. This condition is
caused by a buildup of lime and mineral deposits from your water. If the
pumping action stops before all the water has been pumped out of the
machine, then the appliance requires cleaning.
The  frequency of cleaning depends on the hardness of water used. The
following table gives the suggested cleaning intervals.

Soft water

every  80  brew cycles

Hard water

every  40  brew cycles

Your coffeemaker may be cleaned by using MR. COFFEE CLEANER or
vinegar. For  best.results  use MR. COFFEE CLEANER. It is superior to
vinegar and has no unpleasant odor.

Using Mr. Coffee Cleaner
(Read caution statement on side panel of Mr. Coffee Cleaner box before
use)
1.  Fill the decanter with 4-5 decanter cups of warm water.

2. Empty contents of one packet of MR. COFFEE CLEANER into the

decanter and stir with a plastic or wooden spoon until the cleaner is
completely dissolved. This will make a clear blue solution.

3. Pour the blue solution into the coffeemaker.

4. Place the empty decanter on the warming plate. The swivel basket

with the black filter basket in place should be closed.

5. Turn your coffeemaker on.

6. When the blue solution has stopped flowing, turn your coffeemaker

Off.

7. Discard the blue solution and thoroughly rinse the decanter, lid and

brew funnel.

9.  If a normal brewing flow rate  is not achieved,  repeat the  cleaning steps