Yikes. I would get in touch as soon as you can...that seems like a serious problem.
I've been using a new brush for three weeks now. Everyday it sheds at least a dozen hairs. How long should I continue to keep using it, hoping it settles down, before I contact the manufacture?
Depends if it's a super dense brush like one of the Rooney's or the Chubby...if the shedding persists I'd contact the manufacturer. In this particular case though, since it's been shedding a dozen or so EVERY day for the past three weeks...I'd say it's time to contact the manufacturer immediately.
+1. Time for a replacement brush. My Rooney and two Shavemacs (Finest and D01) never shed.
-Andy