I'm a Native American, I know how to smudge/cleanse.
Okay, you're gonna wanna go down to your local deli/gas station/wherever you can get tobacco products. Buy chewing tobacco. You mix some of the chewing tobacco with water and either put it in a spray bottle or just use your fingers to throw the tobacco water at the objects like a Catholic Priest exorcising demons. The tobacco in the water will drive out the negative energy/cleanse the area, as tobacco is a gift to humanity from the Manitou and as such, possesses divine protective energy.