I have a spray bottle with bleach solution - 1 cup water to 1 tsp bleach. Then I can spray down things that can't be submerged in water. The solution needs to sit for at least 1 minute, preferably let it air dry if you want it fully sanitized Then you can wipe with a wet cloth to remove any residue.

But any stuff I wash in the bathtub I just lay it out on bathtowels until everything is dry.