If you can throw them in a tub toy net – something like this: https://amzn.to/2Jvt6oc – they’ll dry better than leaving them in the tub. If you remember next time you’re in the bathroom you can just give the net a little shake and move the letters around a bit so they can dry a little more. Nothing major, just shake out some of the extra water and move the letters a bit. Should take like 15 seconds.

I’ll be honest, I got tired of dealing with ours so they are no longer “bath toys” and we just play with them outside the tub.

How do you store bath toys? We have foam letters & foam blocks that I just can’t stay on top of with 2 under 2.5. But idk how to lay them out if not all over the tub floor in our tiny bathroom & cramped house.

If there is already mold growing in the foam, I would throw them out and replace them. Once it gets in to the little tiny spaces in the foam it’s pretty impossible to get out without removing that part of the foam. Sorry! If you do replace them, putting the letters where they can dry between baths will help keep it from happening again.