Unpack the foam mattress pad from the manufacturer's packaging.
Place the mattress pad on the ground and allow it to decompress and come to room temperature. This normally takes about one to two hours, but might take longer in especially cold rooms.
Set the pad on top of your normal mattress with the "tacky" side down. Place the fitted sheet on top of the foam pad, and make the bed as normal.
Spot clean any soiled areas by hand with a mild detergent, warm water and a towel. Rinse the affected area and gently wring the foam to get rid of any excess water. Air dry the foam pad for several hours prior to use. Never use bleach or dry the pad in a dryer.