What is the best way to clean out bath toys that store water?
Specifically, we have quite a few toys that have a hole in the bottom and can suck in water and squirt it out when squeezed. A few of those toys are next to impossible to empty of water completely and hence have started growing some mildew.
We're considering squirting vinegar (or possibly a diluted vinegar solution) into the toys and leaving them to stew for a while, but is there a Good Way of doing this? Naturally, any solution ought to be child-safe.