This is the best plastic epoxy I have found. JB Weld plastic weld. There are others if you can’t get it.

So take it apart. Clean it especially if there is any soap. Let it dry. After it is dry it might not hurt to do a light clean with rubbing alcohol. Then epoxy it back together, per the epoxy instructions. This type of epoxy is very noxious. Do it outside and leave the top outside for a few hours. It is also best to not touch it, use a stick.