I'm not a red dot hater, but I'm a man who has doubts. I rarely voice these doubts though. When addressing the red dot faithful, it seems less likely to start a fight than lewd and obscene comments about their wives. My son is among the faithful, so we have had many interesting discussions on the topic. I don't hate them. I have one on a Glock clone that I'm still trying to make peace with.
I have seen a good many of what I consider to be failures with my own two eyes between low key leagues and competitions as well as shooting with my son and brother.
My son's Trijicon SRO once fogged up with ice fog so awfully that I could not see through it. We were shooting on a very cold Winter day that had a bit of ice ice fog. My son left his pistol on the bench a few moments while setting up targets, etc. Called range hot and picked it up. Totally blocked screen from fogging and misting over.
Solution: use a good anti fog wipe such as " cat ****" regularly. That would indeed be a solution. Add that to your regular routine and it's all just fine.
Same Trijicon SRO now in the Summer: we had a "bring a friend day" at our league. My wife and I both invited our son. It was a pretty intensive course of fire requiring at least 60 rounds anyways. My son is normally a very decent shooter. He stepped to the line and started blazing away and missing terribly. He dumped mags where I had fired controlled pairs. Afterwards, when I asked him what happened, he told me his dot failed. He was trying to fire using the silhouette of the dot and failing miserably, even on targets as close as 7 yards. He had turned it on and checked before leaving the house. A few days later he opened the battery compartment to see that some time in the last month or so since he shot it the battery had exploded. There was battery goo and corrosion all over his battery compartment. This was a brand new included battery with a very expensive optic. Solution: run a quality battery? Physically pull it out and inspect it on a regular schedule? Add that to your routine.
Another Trijicon red dot. Son showed up to a Steel Challenge shooting an optics division. Was shooting an optics division. Shot really bad again. Eventually realized that some time in the last week the dot had worked itself loose and was barely secured on the gun. It had been properly torqued and installed with factory included thread locker. Solution...I guess use a quality known thread lock. Check mounting firmness regularly. Don't forget lens wipes. Don't forget physical battery inspection.
Vortex Viper- Brother was shooting his. Suddenly two pieces fly off and hit him in the head and face. Turned out his battery cover got loose. Searched 10 minutes for missing pieces, re-assembled, went back to shooting. Easy solution. Make sure it's screwed down all the way. It'll be easy to check regularly between adding cat ****, quality battery, checking battery regularly, and checking mounting is still secure. Just don't get distracted while doing this routine. Whatever you do, don't let your wife, children, pets, neighbors, phone calls from work, or door to door sales people distract ya'...
I can't count the number of dot failures on my rifle when shooting on cold days inparticular. I'm told that newer quality dots that have 50K hour battery lives don't do that. Apparently my dots didn't get the memo that they can't fail when it's 20 below zero.
On the other hand, I can count times when dots have really impressed me. I did a beginner's league last Summer. Not like learning basics, but learning basics for action shooting. I was the only guy who shot a revolver, so...there wasn't any competition for me. I looked at the scores one day and decided to compare mine to the open sight service pistol category...closest I could find to a revolver category. Turned out, I had done fantastically well. I ranked very highly, which is kinda cool for comparing a revolver score to all the excellent service autos out there. Then I compared my scored to the carry optic division. I was darn near dead last. And I knew many people who had beat my score were novice shooters altogether.
Another time I was shooting a snubby K frame and doing very well at 15-20 yards hitting small steel. I was making some very fast. Solid hits. Heck. I was fortunate to not dislocate my arm patting myself on the back! Then some other shooters show up beside me. A guy gives his wife a dot sighted Glock and the usual basic instructions. She clearly was not a person who shot much. Within a few minutes she was really close to my own speed. If not slightly better. I muttered under my breath, said something about darn whippersnapper kids and their Eelectronic gadgets, laughed at myself and called it a day.
At ASI, my son expected to see a buncha old men swearing about the 1911 and M-14 being the last good guns ever made, etc. He was very surprised to see those old men all carrying modern polymer weapons and sporting red dots. They apparently use them well too, because I sure struggle against them.
Most of my red dot doubts though center around the fact that I do not want another routine added to my life. I do not want to do a pre-flight inspection before carrying my concealed pistol. If I lived in some awful crime ridden city, I might feel different. But
..I live in the suburbs...in Alaska. My J frame usually seems quite adequate. On days that it's not, my full size 8 shot iron sighted 357 certainly is. When it comes down to it, I think a life preserving inspection would be better spent on seatbelts, brakes, air bags, emergency car gear, first aid kits, fire extinguishers, etc.
I will continue working with the red dot pistol I have. I will one day add a red dot to one of my revolvers. But...y'all just gotta forgive me for not jumping in with both feet. I still have doubts.