Instead of just waking up to damp sheets, how about beginning your day by waking up in a puddle of pee?
Get a thick-walled, large contractor trash bag (55 gallon can liners work well)
Cut the bottom off so it's open on both ends
Cut all the way down one side
Unfold the bag and lay it flat on the bare mattress
Put your fitted sheet on
Violá! Now when you wet the bed, your pee will pool under you and be waiting for you in the morning!