Hmmmmmmmmm.

Well, a few questions first.

1. How often do you scoop out or fully-change the litter?
2. Does the bucket have a bag in it? And if not, how often do you clean the bucket?
3. Do you use any baking soda to line the litter box or is it just straight litter?
4. Are there any drains/wet spots that regularly form near the litter box?

I ask because you might actually have something called "drain flies", which despite the name, don't always collect around drains.

Anyway, here's a link about them, in case this is what you're dealing with, and I hope that it helps.

https://www.thespruce.com/getting-r.....-flies-2656670

1: Scoop out maybe 2-3 times a day. It's only 2 cats after all. Fully change little I am not sure, but I do know I changed it less than a week ago.
2: The bucket DOES have a bag and we have been cleaning or at least rinsing out the bucket
3; Just straight litter.
4: No drains, and as for moisture nothing outside of the litter bucket itself.

Having looked up this issue before I does not appear to be drain flies. These bugs look nothing like any pictured drain flies that I see online.

Hrmmmmmmm. Maybe it's the litter itself? :? I think depending on the type of litter that you use (like clay, sand, odor trapping, etc.) it might actually attract flies, especially if it has stuff like wood bits mixed into the litter itself.

Anyway, I found another article that might help, with one of the big takeaways being to consider a different type of litter and also washing the litterbox like once a week.

https://pestpreventionpatrol.com/ho.....om-litter-box/

Anyway, I hope this helps.

Alrighty, will try some of the home remedies mentioned in that article.

I use the Zevo blue-light traps, which seem to work wonders on smaller clusters, not sure how well it'll work on massive swarms.

Every time I scoop my cats poop, I put it in a plastic walmart bag and tie it shut and toss it in the trash.