Frost defeated my TSS system.

So on Saturday, after cleaning the frost off my windshield, I jumped in the ol' Tundra only to find that the PCS had automatically turned itself off. I got out to check the badge thinking maybe the frost had covered same and there was a little but not much. I wiped it off with the heat from my hand. I asked the service manager where I got the truck about the issue and he said he said he has seen frost and snow cause the sensor to turn off the PCS. He also said he has seen something as small as a bug splatter do the same. Anyone else having these issues or know if Toyota has something in mind to solve the issue?