A: I got this off the brand's website: Add 25 beads, about a handful, to your vacuum or canister. When the vacuum is on, the scent will be dispersed into the air. Discard when bag or canister is full. Recommended for all bag and bagless/canister vacuums, as well as hand-held vacuums. Not recommended for use with a Dyson vacuum or brands of vacuums that lack an exhaust system. The lack of exhaust systems prevents the scent from being released.