Kirkland detergent(s)
Unless you are doing boatloads of laundry, you should avoid buying detergents in bulk since they only maintain their cleaning power for six months to a year, per Good Housekeeping. Plus, other stores tend to have more coupons and deals for detergent than Costco. One blogger found a detergent on sale that equals $0.03 per load compared to Kirkland’s $0.115 per load. The Kirkland Signature Gel dishwashing detergent isn’t much of a hit either, with a poor overall score from Consumer Reports.
