Why does the antifouling come off?

 

If the antifouling comes off/partly peels off during the season, this is in most cases because the surface underneath was not clean.

The fall-out that comes during the winter with rain and snow, contains a lot of pollution and soot. This in combination with the water running down along the hull sides, carrying with it wax residue and grime, makes it necessary to wash the hull with Boat Cleaner and rinse thoroughly with water afterwards, before applying the antifouling.