If more than a drop comes out from your mix then yes it is to wet, other than that condensation build up is normal. And I used to have a standing water incubator before my girl re absorbed and had time to make a different one. Add salt to help prevent the standing water from getting moldy.
He's using hatchrite so it should be good to go right out of the bag...no mixing necessary...
Lucifer Sam, Siam cat...
Always sitting by your side,
Always by your side...
That cat's something I can't explain...