Product review (5 stars): Saved me $300 bucks!
Saved me a few hundred bucks on an Appliance repair house call.  I learned my lesson the first time I called an appliance repair guy to "fix" my LG dryer.  It wasn't drying well using the sensor.  The place repaired and came out in basically just reset the dryer system by unplugging it back in charged me $95 bucks!  I get it, he has to make money for his time and experience.

Anyway, when the same dryer started making a horrible squealing / screeching noise when the dryer ran I decided to lookup the problem.  These dryers are super simple machines to take apart and repair.  It took longer to muscle the dryer off of its built-in location in our home than to perform the repair.

My issue turned out to be a seized wheel.  The dryer drum is supported by four wheels.  I changed out all four and cleaned out all of the lint and dust inside.  It runs smooth and quiet again.