Inspection, cleaning and replacement
In a busy self-serve or tunnel carwash, brushes should be inspected by attendants multiple times per day, according to Dan Pecora with Erie Brush & Manufacturing Corp. Frequent inspections are important for two reasons:
Brushes need to be completely cleaned any time dirt, grit or grease is on the brush or in the bristles. A new customer may smear leftover grease on a paint job or scratch a vehicle’s finish with grit if he or she uses a dirty brush.
With hog’s hair, brushes should be replaced when the shortest hair is less than three inches in length. With nylon, brushes should be replaced when the bristles are bent over and will not snap back. Here, the nylon has failed when it comes to bend recovery.