Amazon offers the Chemical Guys Citrus Wash and Gloss Concentrated 1-Gallon Car Wash, model no. CWS301, for $10.97 with free shipping via the steps below. That's $2 under our November mention and the lowest total price we could find by $28. To get this deal:

1. View the Chemical Guys Wash and Gloss Concentrated 1-Gallon Car Wash for $17.61
2. clip the $4 off coupon on the product page
3. order via Subscribe & Save for a final price of $10.97

Be sure to cancel your subscription after your order arrives to avoid being billed for subsequent shipments.