Use a flat head screwdriver to pry open the plastic pieces that cover the screws. Using the same flat head screw driver, unscrew the large plastic screws holding the old seat in place. There are usually plastic nuts on the underside that you can hold on to while removing the screws. Remove the old seat. Clean the area where the screws were and dry thoroughly. If the new seat has an adhesive pad, remove the covering from the adhesive and put the seat in place. Thread the new screws through the holes and attach with the new nuts. If there aren't new nuts and screws, you can use the old ones, provided they weren't damaged during removal. Snap the caps covering the screws on the new seat in place. Be careful not to over tighten the screws! Since they're plastic, they can be easily damaged by a screwdriver!
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Use a flat head screwdriver to pry open the plastic pieces that cover the screws. Using the same flat head screw driver, unscrew the large plastic screws holding the old seat in place. There are usually plastic nuts on the underside that you can hold on to while removing the screws. Remove the old seat. Clean the area where the screws were and dry thoroughly. If the new seat has an adhesive pad, remove the covering from the adhesive and put the seat in place. Thread the new screws through the holes and attach with the new nuts. If there aren't new nuts and screws, you can use the old ones, provided they weren't damaged during removal. Snap the caps covering the screws on the new seat in place. Be careful not to over tighten the screws! Since they're plastic, they can be easily damaged by a screwdriver!