I had known about the zero shift at high or low temps but didn't know that it also occurs during high moisture. Apparently EOTech knew about this but chose not to disclose it. Elite Defense (EOTech's international distributor) has since cut ties with EOTech.
BREAKING: U.S. Government Sues L3 Com's (EOTech) For Fraud - The Firearm Blog
BREAKING: U.S. Government Sues L3 Com's (EOTech) For Fraud - The Firearm Blog