Lenscrafters Lenses

I bought new glasses from Lenscrafters three months ago. After two
months the lenses were so scratched I needed new ones. The original
lenses cost $300 and the replacement lenses were $150. In the past I
don't recall plastic lenses being so easily scratched. Also I remember
replacement lenses being free for the first 6 months.

Now I live in a desert, (dusty) and work outdoors with livestock (dusty
and dirty) so I can't get away from dirt, but are the new hi-tech
glasses of poorer quality than in years past? I'm too paranoid to wash
the glasses, for fear of scratching them worse. Lately I'm soaking them
in soapy water then rinsing and letting them air-dry. That doesn't
get them totally clean.