M.S.
Duct tape is interesting. If that doesn't work, you should go the freezing route. Please take into consideration where the warts are coming from. Someone has most likely brought them into the house and uses the shower. Get to the root of the problem so they don't keep coming back. Worse, you don't want the wart germs in the tub and then you daughter has contact in her private area on the tub floor. The virus could be easily transmitted in that way. If anyone takes showers in a gym setting, wear gym shoes. Even in a gym sauna.
Updated
Duct tape is interesting. If that doesn't work, you should go the freezing route. Please take into consideration where the warts are coming from. Someone has most likely brought them into the house and uses the shower. Get to the root of the problem so they don't keep coming back. Worse, you don't want the wart germs in the tub and then you daughter has contact in her private area on the tub floor. The virus could be easily transmitted in that way. If anyone takes showers in a gym setting, wear gym shoes. Even in a gym sauna.