Those suckers are nasty and I also have a phobia with all worms in general. I used to have an infestation but they come and go. Bristle worms provide such an important function to the tank so I’ve learned to accept and control them. Like others have suggested, get a natural predator to control them. For me, just feed less or enough that nothing fall to the bottom. Finally — they will eventually come back so why waste your time and energy?