Question about scene with snoop

When her n Chris are in a vacant about to clean up/do their thing with a dead body. She puts gloves on but it looks/sounds like she spits in them before putting them in which is very gross. She show blow into them to make it easier to put on or spit? Is that a thing? Do ppl spit in gloves? Blowing in them makes more sense but it really sounds like she spits in em. PLEASE END MY TORMENT AND HELP ME WITH AN ANSWER, thank you