Seat Belt Retractor Adjustment

Compressed air is a good start but don't be surprised if you need tiny tweezers and dental pics to get wound hair out of it. They can collect hair and stuff like a carpet sweeper.
There are a few spots where a small amount of grease was applied during assembly.
If you did use a product like brake cleaner that removes the grease, that is all you would want to reapply. WD-40, 3 in 1, wide spread might be fine or might cause it to collect more stuff faster.