Condensation on the lid does not necessarily mean that the bin is too wet. What does the bin smell like? Is there leachate coming out of the tap? If it smells like rich soil or forest floor, and there is nothing coming out of the tap, you are probably fine. Worms can take it pretty wet, as long as it can breathe.

If you need to dry it out, toss in more bedding, stop feeding, leave the lid off.