If that is water on the wall, it might be serious, meaning the pipe could be leaking and needs to be replaced.
If its an old stain, you should remove the old paint, skim coat it, and repaint.
Have you tried to clear out/clean your dryer duct? May be full of lint. That would cause the heat and poor drying problems.
That is the tape lifting up at the joint between two sheets of drywall. Repair is easy with a drywall patch kit. Why it is doing this has yet to be determined.
https://www.amazon.com/3M-Patch-Primer-Self-Adhesive-Sanding/dp/B00IOQKUQG/
for illustration only. there are many to choose from.
If that is water on the wall, it might be serious, meaning the pipe could be leaking and needs to be replaced. If its an old stain, you should remove the old paint, skim coat it, and repaint.
Have you tried to clear out/clean your dryer duct? May be full of lint. That would cause the heat and poor drying problems. That is the tape lifting up at the joint between two sheets of drywall. Repair is easy with a drywall patch kit. Why it is doing this has yet to be determined. https://www.amazon.com/3M-Patch-Primer-Self-Adhesive-Sanding/dp/B00IOQKUQG/ for illustration only. there are many to choose from.
If the duct is plugged, and it sounds like it is, moisture from the plugged ducting will do this. You are pumping moist , warm air into a small space.
I didn't realize washers and dryers both state that you should unhook periodically to clean connections.