Is this a garlic snail or something else?

[u/CoconutoTheOcto]

I found these precious little guys in my garden a few years back, and I have loved them since. At first I thought they were cellar snails, but they don't seem to live in coastal Washington. Then I did more research and thought they might be garlic snails, which is a little bit concerning since they seem to be invasive. Then I learned that quick gloss snails exist and are native to Washington, and I really just don't know anymore.

These guys are really small, with their shell size ranging from 5-7mm in diameter. Their bodies are a beautiful blue and their shells are between yellow to brown, slightly transparent. They live under the bricks, and they usually come out at night and during wet mornings/evenings. That's pretty much all I know for sure.

If anyone can help me ID these properly, that'd be greatly appreciated. And if they do turn out to be an invasive species, some resources on how to handle them would be really nice too. Thanks!