So I had a dubious fog like issue in my Pathfinder PAW-1100. My gaskets for the caseback and barometer were good so I was perplexed as to what the issue was. Opened the back and ran a hair dryer on high for quite a while to no effect, this bugged me since I could see the issue whenever viewing the display at an angle in direct sunlight. I made the decision to remove the module and try to clean the inside of the glass, it was not an easy task with it being solar and atomic plus feeling that I may damage sensitive parts. Let me tell you that these watches are built well, I completely disassembled the watch and removed the module after disconnecting the barometer and atomic radio ribbon cables, once I removed the module and held the crystal up towards light you could really see the problem, I used some alcohol on the inside of the crystal but it did nothing! So I continued disassembly, once I pried off the metal trim ring you can pop out the glass which is 2-piece, this is where the issue was, between the solar bezel insert and actual glass crystal which lie on top of each other, once I cleaned in between the pieces the glass returned to "crystal" clear. During this process many pieces fell out including the atomic radio, I dropped both solar bezel insert and crystal onto the floor twice, and much force was needed to remove and re-insert the solar panel and crystal, not mention the man handling I used to adjust the metal foil module insert inside the case and to get the module back into place. I thought for sure something wouldn't work after re-assembly but I am pleased to say that all functions are working, barometer is within 0.4, altimeter is within 20 ft of my local weather station a few miles away, compass is correct and I was able to get 3 receiving bars to Denver! I have nothing but praise for Casio's engineering and durability of the internals for their watches.