back into place, I put a nice bead of silicone for extra measure. I did the same with the version 1. It's been through numerous car washes and heavy rain, no issues with it fogging up. As Bernie mentioned there a small vent on the projector side of the housing and that is where the moisture tablet sits. The other factor is when your sealing these back up, your using a heat gun to soften up the OEM glue, which should kill any lingering moisture and stuff.