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Walgreens [walgreens.com] has Air Wick Plug-In Kit (Warmer + 1 Refill, Lavender & Chamomile) on sale for $1.34 when you ‘clip’ the $3 off coupon and apply promo code WAG10 at checkout. Store pickup is free on $10+ orders.

Note: must be logged into your account to ‘clip’ the coupon. Promo code has limited # of uses per account. Availability may vary by store (it’s in stock at my local store, YMMV).