Despite the detergent's limitations, competing brands appear to be losing customers to Kirkland Signature's budget friendly prices. One Ridditor wrote, "Used to buy tide pods exclusively, always looking out for those buy 2 get 1 deals and would stock up months at a time. But I switched to Kirkland, which is cheaper than any deal I've ever gotten with Tide, and haven't noticed any difference in quality of wash. We also don't get the random undissolved tide pod we rarely got with tide pods."
Kirkland Signature detergent is also performing well with professional assessors. After testing 17 detergents to 10 common stains in cold water, Wirecutter named Costco's house-brand detergent as the budget pick. None of the 17 detergents were able to effectively remove makeup, but Kirkland Signature did a significantly better job than the rest. In addition, it ranked as a leader in removing odors. It's hard not to see the positives of buying a detergent that is half the price of competing brands all the while receiving the same benefits.
