Keep it as cold as possible and when you get the CO2, purge the head space. By the way, if you pick up a baby scale at a swap meet, you can check your kegs by weight. Pints a pound, world round (plus or minus a jigger).
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk