Ignoramus7928 wrote:

Thanks to all. I solved the problem by buying a new belt at Napa Auto
parts. Today I blowed a lot of snow, including huge slushy piles near
the end of my driveway. Everything works. I will have to look for a
new drive belt though, but it is not urgent.

The Napa guys strongly advised against belt dressing, even though they
had it for sale.

Good...and the NAPA guys are right...for ordinary applications, the need
for a belt dressing is a sure sign something else is wrong...