FREE Wisk Detergent Sample (New Link!) September 16th, 2010 By Kaley Leave a Comment Would you like to have these great deals delivered right to your inbox? Subscribe to our email digest. Or if you use a feed reader, subscribe to our RSS feed. Thanks for stopping by! Hurry and grab another FREE Wisk Detergent sample. This one is from Costco, but no membership number is required. This one will likely go fast! Thanks, Coupon Pro! Be sure to check out more great freebies that I’ve posted here.