Review on Precision Pro NX9 Golf Rangefinder - Laser Golf Range Finder with Magnetic Holder, 600 Yard Range, Flag Lock + Pulse Vibration, 6X Magnification - Slope & Non-Slope Models by Andres Imaging

I bought this rangefinder about a month ago and on day 2 of normal use some strange wavy lines started appearing in the viewfinder. It seemed to get worse every day so I sent it back for a replacement. After only 1 day of using the replacement model, the same problem appeared. I protected each block well and did not expose it to rain or liquids. I plan to return this one and try another replacement. If the next one is also defective, I won't stick with this model. Has anyone else had this problem? See photos. Orange sky from 1st block. Blue sky from the 2nd block. That issue aside, the range finder seems to work fine, but if I'm already having trouble with two serial devices after a little use, I wonder how much worse it can get over time. Possibly a quality control issue. I will update when I get the 3rd block. UPDATE: The third unit appears crystal clear in the viewfinder and after about a month of regular use it seems to be working well.