how do the rest of you get rid of gnats inside?

Are they around your houseplants? Nine times out of ten indoor gnats are fungus gnats breeding in wet compost. Let the top few cm of the soil dry out completely between waterings, water from the bottom for a while, and stick yellow sticky traps in the pots for the adults. The larvae die once the soil stops being permanently damp. If they're round the sink or fruit bowl instead, that's fruit flies or drain flies and it's a different fix.