why do shirts that are rayon and polyester ball up? How do i avoid that? It's ruining my clothes!?

Answer 1

You need to FOLLOW THE DIRECTIONS on the tag(s). Use this link to decipher the tags:
http://www.textileaffairs.com/lguide.htm

Rayon and Polyester are man-made materials.

Rayon, unlike most man-made fibers, rayon is not synthetic. It is made from wood pulp, a naturally-occurring, cellulose-based raw material. Regular or viscose rayon has low wet strength, resulting in loss of stability or the tendency to shrink or stretch easily when wet. Although resin-treated rayons can sometimes be hand or machine washed with success, regular rayon normally requires dry cleaning to maintain appearance and shape.

Polyester: Use warm water add fabric softener to final rinse, machine dry low and remove promptly from dryer. If ironing is needed use a moderate warm setting. All polyesters can be dry cleaned.

Answer 2

Polyester Balls

Answer 3

Do you mean get those little raised things? I bought a fabric shaver and that seems to work well.