I use different things based on what it's for. Ground flax seeds for baking, aquafaba for souffles, tofu with black salt for scrambles, "Just Egg!" for egg wash when frying, and maple syrup for egg wash on breads. Of those, I mostly bake, so keeping the flax seeds around is much more convenient for me than regularly buying eggs anyway.
The ones I have (SF30/SN30) remember which mode they're in so I just press the start button and it connects to my Switch. Then if I change it to bluetooth, it's the same for my Steam link until I switch it back. Plus there's a sticker on the back that gives the combos to change modes (Y+Start=Switch, X+Start=Bluetooth, etc). Some models, like the Lite 2, do have that physical mode switch.