I have two beds in my unit and both of them have wet spots at the foot on my side and not my partner's side. I put plastic bags to stop the moisture from coming through, but it still did.
There has to be reason for the wet spots so that is where you should start. What happened 5 days ago that could have started this?
You could have a pipe leaking in the wall. The moisture could be sleeping under the carpet and the foot of the bed could be the lowest point, where it collects.
Mysterious wet spots.
Step 1
Do you have a cat or dog?
Step 2
If you do maybe they peed on the bed.
Step 3
Try blow drying the mattress in the wet spots on both sides.
Step 4
Check the ceiling for leaks.
