I need a vacuum recommendation. I have a sewing business in my home, and we have went through 3 vacuum cleaners in less than 2 years. I need one that can pick up thread off the carpet, and it also needs to do stairs.

the problem that I am running into with our current vac is that the thread gets wrapped around the beater brush. i clean it out periodically, which *should* solve the problem, however it somehow gets thread wrapped around the ends where it spins. the thread then melts, hardens, and then melts again the next time the vac is used. it overheats the motor and smells terrible. The beater brush then needs to be replaced. we have replaced it 4 times, at about $40 each...it's not worth it anymore.

(it is a kenmore, very highly rated by consumer reports. my in laws have the same vac and they are happy with it..I guess I would be too if I didn't have so many problems with it)