I have a 25-year-old electric Maytag dryer that is overheating. It doesn't cool down at the end of the cycle and even on 'air fluff' the clothes come out too hot to touch. I clean the lint filter every load and checked the air exhaust hose, it is clear

Clean lint trap after every use and vacuum out the duct work both inside the dryer and from the dryer to outside the house.
Ensure whether ventilation is good.
If everything is ok .

Then it is most likely the cycling thermostat . You need to replace it .

From Repair Clinic:

Usually when an electric dryer overheats it's because of a defective cycling thermostat or a clogged vent system. Clean any lint from the internal and external duct work, and/or replace the cycling thermostat.

Your dryer has some internal ductwork. If it gets clogged, your dryer can't dry properly. In most dryers, to get to the internal ductwork to clear the clog, you have to substantially disassemble the dryer. A quick way to check for internal clogs is to remove the lint filter and use a flashlight to inspect the inside of the duct. If it looks clogged and you can't clear it using your vacuum, contact a qualified appliance repair technician.

Although this isn't a common problem, one of the thermostats that controls the temperature in your dryer may break and cause the dryer to heat poorly. If so, you need to replace it. The thermostat is usually a small, round, black device mounted to an oblong steel plate. The plate is mounted to the internal ductwork with two screws.

Try to unplug the power cable for few hours to reset any static charges. Did you check the exhaust fan as well if it's properly spinning?

I wish i had this trouble my clothes take to long to dry it sounds like ur dryer is working fine all except the air and fluff cycle sounds like u need to ethier call a maytag guy out or buy a new dryer