You have a basic Whirlpool-made dryer. True, it could be something as
little as a coin caught in front or rear seal. Yes, you could
lubricate, but sometimes replacing is better. Another option, for
something like a roller, is to remove the roller, clean the bearing
surface of the roller with a light solvent (a Q-tip helps for this),
clean the shaft, apply just a drop of oil to the shaft, and replace the
roller. The idler can make noise too.
To get access to the drum, unplug the dryer, remove 2 screws at lint
screen. Pop the top and rotate back on its rear hinges. Disconnect
door switch. Remove 5/16" screws at upper left and right of the front.
Pull front a little up off its lower clips, and then away from dryer.
Note belt placement so that you can put it all together when you are