At one time, the electric percolator was the way to brew coffee at home. But to continually brew a good cup of coffee meant that the pot needed to be cleaned regularly and thoroughly. Unlike the glass carafes used today, minerals deposits could build up in an electric coffee pot, resulting in bitter tasting coffee. However, with proper cleaning, a percolator still can produce a great cup of coffee.
Remove the plug and allow the percolator to cool.
Remove the basket, stem and cover to wash thoroughly with hot soapy water. Rinse and allow to dry.
Empty the percolator of any leftover coffee and fill the pot with hot water and a little dish-washing liquid. Wash with a sponge or dishcloth. Pour some of the soapy water through the spout. Do not immerse the percolator in water.
Scour the heating well area at the bottom of the pot with a pad.
Drain, rinse thoroughly and allow to dry. Store with the lid loose or off.
Remove mineral deposits every second or third week of use by filling the pot halfway with vinegar. Fill to its measured capacity with water. Assemble the pot with stem, basket and lid, plug in and allow it to run through its full perk cycle. Allow to stand undisturbed for 15 minutes. Unplug the percolator, drain, allow it to cool and then wash it.