It doesn't recognize my disk

I spilled water and eventually reached my PlayStation and only the bottom of it got wet. I dried it, but when I tried to play the game that was already in there it was saying " insert disk in order to start this game" so I took the game out, cleaned it and put it back in. Now it says " Unrecognized Disk. " When ever I put the disk in there it spins , stops, makes a clicking noise, then spins again till finally it tells me it doesn't recognize my disk. I've read solutions saying to clean my opticle drive PBC but I don't kno how to do that , I'm scared if I tried I would mess up something , please help