DiyHomemadeCarAirFreshener

Value

Air Wick sells for $8 per 2ml (i.e. $4,000/litre -- that's about the same price per litre as Louis XIII Cognac). They last for about 1-2 weeks on average, so if you wanted to keep your car smelling fresh for an entire year, you'd run a $200-$400 bill.

Instead, for about $25, you can scent your car for an entire year.

Ingredients:

Ingredient	Function	Price (CAD)
1 pepper shaker with adjustable holes	Used to control scent release	$2.50 at Dollar Store
Baking Soda	Absorbs odors	$2.00 for 500g box at Walmart
Essential Oil (e.g., Peppermint)	Provides the desired fragrance	$18 for 118ml bottle of Peppermint Oil, good for ~1-2 years
Cotton Balls	Absorbs and holds the essential oil	$3 for jumbo bag at Walmart
Total Upfront Cost		$25.50
Breakeven Point		~3-6 weeks

Instructions

1. Get a pepper shaker with an adjustable hole, kind of like the following.

2. Place 3-4 cotton balls inside it, to absorb the oil.
3. Sprinkle liberally with essential oil. (At least 15-30 drops)
4. Fill up to 1/4 with baking soda

Twist open the cap when you want to scent the car. Leave in cupholder. Refill every 2-3 weeks.

Can also freshen entire rooms, if they're small.