You know, these ducks.
My little one loves her ducks, some ducks friends, a small manual portable shower, and so on: all they go to her bathtub and we play a lot.
In the end, although I squeeze, shake, dry using a hair-blower, there's always some water left inside. And no matter how I clean using hot water, put them in the boiling water on my stove, after some time I can notice that something (algae?) is developing inside. So I go and try everything again.
How can I clean them after every bath ? Or how can I clean them every x days?
Edit
Those cheaper ducks could be thrown away, but some of the others are hard to find/expensive. And the mini-shower wouldn't have any fun without splashing real water (that we use to bath the ducks during the bath).
For reference: an almost duplicate question but with different answers: Cleaning bathtub toys that squirt water
