It will peel.

counter-clockwise to lower the water level in the tank... if this doesn't work, you'll need to replace the fill valve. Also the flapper or seat gasket (depending on which flush valve your model uses) may need to be replaced. This is often times noticeable by the tank filling up every once in a while without a flush. But if it constantly runs, you need the fill valve.

not have this protection. The biggest killer of AC systems is plugged coils. It not only raises pressure it raises your utility bills.

Take a garden sprayer, and spray up and under the fins. Do not use the real hard direct spray pattern, as the pressure could bend the fins over. Simply rinse it off in that manner. Take care not to spray right in the area of the electrical power entrance just for safety. I would also suggest not to do this when running, or you will get a face full of water when the fan is running.

If your unit is near your discharge from the dryer vent, check carefully for lint deposits. If this is heavy build up, your better off having the unit professionally cleaned as it will require some dismantling of the unit to remove the lint.

cause of my allergies. It wasn't. I am in Ga. the allergy capital of the U.S....and beware if they stick a camera up vent to show you mold in the ducts. Some companies have a film of a moldy duct that you are looking at. Make sure you have a reputable company. Caviat Emptor (or however you spell it)