Seems a bit over the top to worry about Bluetooth pairing at the airport. In my experience, those requests are just from other devices nearby and don't usually lead to anything bad. Your mileage may vary, but I've never had a real issue leaving it on.

Saw someone buying big tubs and using small jars instead.

Yeah that's the real pro tip right there. Those thin coatings just don't cut it for bio stains, they let everything seep back up. Went through the same headache with a dog that kept finding the same corner. Switching to a heavier duty seal was a total game changer, no more chasing old smells. It's one of those fixes you only learn from getting burned.

Seriously? You're saving what, like two plastic bottles a year? Feels like people pat themselves on the back for the smallest stuff now. The planet's got bigger problems than your little spray bottle. It works for you, fine, but let's not act like it's a major win.