I agree with what most have said, and what Nigel says, get it dry and get it treated.
I bought mine and it had condensation on the inside, a bit of mould also inside, vinyl roof though. I let it dry completely and cleaned the mould away and treated the outside with a product can’t remember which and all was good, never leaked. I later replaced it with a mohair roof and did exactly the same clean/waterproof and that was always dry inside.