hmm, hair algae once again!
Of course, it's all about excess nutrience. You can do a few things:
1. Buy a nice working protein skimmer. If you have one, make it work more efficiantly and clean it often.
2. If you don't already have a lawnmower blenny or a foxface fish or a sally light foot crab, (heed the crab) you might want to get one. They will eat the crap out of it.
3. Water changes to remove excess nutrience.
4. Take a bowl of freshwater and keep it with you while you are manually removing the hair algae. After every time you dump a load, clean your fingers in the freshwater to prevent the spores from scattering in your tank.
Have fun!