Best advice is to avoid the problem! Lots of brushing to take care of the hair and a diet of food without dyes and additives :-)
We feed Dick Van Patten's Natural Balance cat food so I can score on that one but Isla is getting some little mats on her hips so I'm not doing as good on the brushing LOL
Furminator time!!!
p.s. I hope you are able to get it out. Oxyclean is our preference here.