Hi Val, sorry about you blisters on the soles of your feet. Adter shower use antiseptic wipe to clean, then pierce blister in two places and genrly push flat until completely emptied. Then apply antiseptic and cover with a large fabric plaster. Waterproof plasters don't stick well and make the skin sweat too. If too large for large plaster then use a square of non adhesive pad, cut to shape, and use strapping tape.