I have used many different sunscreens in the past. My oldest is 13 so I've had many years to get it right and Copper tone is the one our family has come to like and love. It seems to last longer. We make sure to put it on about 10 minutes before heading out in the sun and apply as directed.
I love these sponges but they don't last very long. I go through about 1 a week. I've never tried to wash them but I may look that up. They smell after a week just the "old water" smell. This is all sponges I'm sure.