oil in bearings attracts dirt and grit..
tbh once a fan is on its way out it should just be replaced or repaired by a workshop, you may be able to coax it on for 5 minutes but its gonna go sooner or later.
tbh once a fan is on its way out it should just be replaced or repaired by a workshop, you may be able to coax it on for 5 minutes but its gonna go sooner or later.