Did you run it with hot/warm water for 10 min before you put it in your tank?
I did this and still mine took about two weeks to start working properly.
I remember it takes a while but then it runs like a clock . Mine stops skimming for a few hours after I feed the fish, I don't adjust it or anything it just comes back to normal on it's own.
It will also will react to the clue/epoxy, so try not to use it for now.
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