Please don't rot...

The garlic isn't looking too good. I gave up waiting for a warm dry day to harvest them and ended up lifting them in the rain last week. Since then they have been on slatted shelves in the garage, but the leaves are not drying out. I have already found three which are starting to rot.
I've got rid of those and shifted the rest into the greenhouse. Can't think what else to do.
Any tips anyone?