[header] How to wash acrylic fibers [title] Pretreat any stains. [step] You can't rely on detergent alone to get out a big stain on your acrylic clothes. Hit the spot with a spray stain remover and rub the remover in with your fingers so you know it's really worked in the fabric. 
[substeps] Don't forget to spray the stain remover on the inside of the clothing too. If it's a really old or stubborn stain, try scrubbing the remover in lightly with an old--but clean--toothbrush.