This filter catches bits of fluff and other objects, to prevent blockages and possible leaks in your tumble dryer. It is usually located just inside the dryer door and must be cleaned after each use of the appliance. Replace the filter in case any damage or breakages occur.
This job of this carbon brush is to earth the drum of your tumble dryer. Carbon brushes are designed to wear down over time as they are in constant contact with moving parts. When this brush does wear down it can cause a build up of static electricity in the drum.