You ain't felt pain until you contaminate your wife's laundry with fiberglass dust.
Here's a little trick that helps ease the itching:
1.) Take a cold shower
2.) Grind a lot of baby powder all over your body
3.) Hot shower after glass work
If you still feel itchy, rub nylon stocking to remove micro splinters.
Remember:
Don't just throw your clothes into the laundry basket. I run them separately, twice. Then run an empty rinse and spin cycle before running another load of laundry.