I used electrical terminal cleaner and a Q tip to clean the interior of the battery compartment. I also ensured the battery holder was pushed all the way in and tight, and the screws were tight. I took clear silicone and caulked around the mounted fixture. If you look up rvlock.com you will find information on installation, resetting the pass keys and contact phone numbers. The RV Lock folks are very accommodating and helpful, give them a call and discuss the water issue as well as any other issue with their product, they were extremely supportive towards me and even provided replacement parts within a few days.