Garbage flies anyone?

I know this is random I dont know where else to post this but has anyone been having issues with those big fat garbage flies? All of a sudden in the last couple of months they are getting inside our house there's always like 2-3 in our house at all times...and no I don't live in filth or a hording situation lol we even got a new garbage bin with a lid for outside and both outside bins are regularly rinsed out with a little bleach and both have lids. Now, we have a toddler and we use the diaper genie so those bags are put in the bins about once a week but the flies only started recently so I'm inclined to think it's not the poopy diaper genie bags (that are always tied up tightly). One neighbor is a snowbird their house is boarded up and clean the other neighbor everything seems ok I mean I don't smell any carcasses or decay. Wtf is it? I'm going to Home Depot to get some stuff but I honestly don't think it will make a difference. Every time I go outside to put a garbage bag in the bin and I open the lid, they are swarming in the bins. Again...nothing has changed in our household in terms of garbage content so I want to know why and where they are coming from.

Any advice?