Condensation on EXTERIOR of gas tank

Can anyone advise on the fact there is condensation dripping from the exterior of the gas tank. The floor under both sides of the tank is quite wet. Oh, maybe the condensation is coming from the wet floor... huh. Why is the floor under and behind both sides of the gas tank wet?

I read the posts about the speedos and pitots. I don't think these are the problem. I put 5200 around the rudder housing because there was a slow drip from there.

What would cause condensation from the outside of the metal gas tank?

If the problem is wet carpet start with wet carpet, not an assumption of a condensating gas tank.