I also don’t have a dog in this either but:
Operator error is the most common problem of any equipment not functioning as designed. That includes hunting with a $500 or $5000 rifle, handloads, scopes and their mounting, sighting in, and so on. As a hunting outfitter you probably see many self-induced problems!
The second most common fault is lack of or incorrect maintenance. You made me curious about what Timney recommends for maintaining their triggers so I checked the Timney website:
From their FAQ page:
https://timneytriggers.com/frequently-asked-questions2
- Should I use lube or oil on my Timney trigger?
- No lubrication is necessary as Timney uses Teflon nickel plating. It should be keep clean but doesn’t need oil.
- How do I clean a Timney trigger?
- Timney recommends using an alcohol based cleaner that evaporates easily. Ronsonol lighter fluid and Coleman White Gas both work well to remove dirt and debris and evaporate fully. Compressed air and the alcohol based cleaner are all that is necessary to keep your trigger clean.
I was wrong to recommend graphite. Sorry to all.
From what you and others have posted about Timney trigger failures, in either very cold weather or from dust and dirt accumulation, these failures may likely be caused by lubricants either freezing or being a “dust magnet” in dry field conditions. I admit that I like a coat of Kroil penetrating oil on my firearms. I think your friend with the lighter fluid was on the right track. I need to follow his example and break out the lighter fluid and “canned air” (for computer maintenance) just in case!