Molecule Labs Helmet Cleaner & Polish removes dirt, oil, bug splats, and rubber streaks from your helmet. Just spray on and wipe the grime away. It is formulated to be compatible with most common helmet paints, including matte finishes. 4 ounce pump spray bottle should last for a few race seaons.
Note 1: Because of the wide variety of paint formulations, always test any spray like this on a small area to determine compatibility first. Not guaranteed compatible with decals.