"ATP" wrote in message
...
Chains should be sharpened every time you use them.

Debatable.

Taking them to a pro after several sharpenings might make sense.

Or use some sort of a jig so as to correct any cumulative filing errors.

The right size round file will get it done in about five minutes.

Rocks and dirt are basically an instant death sentence--avoid like the
Plague and you'll likely get at least a couple hours worth of productive
cutting time between touch-ups.