Drying manually only gets rid of surface moisture, you will need to dry the moduels alone in a cool to silghtly warm air for upto 2 or three days.
Did you notice a red sqaure?
How did it happen? Working in a humid environment, kitchen etc. and then going outside in the winter creates condensation.
Did you see a red square as in the following link? If you did the warranty is void.
If mositure has got into the core module, which is likely, it will take a while to dry.
Take a look at the iFixIt breakdown. You can go past step 7 if you no longer have a warranty i.e. if you see the red square. You can dismantle more and dry a bit quicker and more thoroughly.