Dust and debris can accumulate on the carriage rail, which run along the length of the gantry. The bearings that run on the rail are equipped with shields that are designed to keep debris from entering the bearing housing. After a period of time and use, debris can accumulate on the outside of the bearing shields as the carriage travels along the gantry.
Inspect and clean the rail and bearings at least once a month. If you notice any dirt or ink on the gantry rails, or an accumulation of debris on the grey rail bearing shields, clean them immediately.
Gloves (for example: Ansell Microflex 93-260)
Cloth-Poly Wipe 10cm x 10cm (lint-free)
In the event of an ink spill on the rail, it should be cleaned immediately, before the bearings have a chance to run over the spill. Slight ink stains that remain on the rail after cleaning are not a major problem.
Do not use a solvent such as IPA because this will remove the grease and leave the rails prone to rusting.