Costco’s Microfiber Towels Spark Urgent Debate Among Detailers

UPDATE: The debate over the safety of using Costco’s Kirkland Signature microfiber towels on car paint has intensified following recent tests by detailing experts. Buyers are eager to know: are these low-cost towels a bargain or a risk to their vehicle’s finish?

Detailing professionals are weighing in after testing the 36-pack microfiber towels, which boast a low price that has made them a staple for many Costco shoppers. Recent evaluations reveal that while these towels are versatile for home cleaning, their effects on automotive paint are more complicated than consumers might expect.

The Kirkland towels feature an 80/20 blend of polyester and polyamide. Polyester delivers scrubbing power, while polyamide adds softness and absorbency. However, enthusiasts argue that the “gold standard” for car detailing is a softer, more absorbent 70/30 blend, which is preferred for delicate finishes.

Jon Delieu from Forensic Detailing conducted a head-to-head test, comparing the Kirkland towels against high-end microfiber options on a fragile, piano-black B-pillar trim. The results were concerning: the Kirkland towel left noticeable micro-scratches, while the premium towel left the surface flawless.

While the Kirkland towels weigh in at approximately 350 GSM, the detailing community has long criticized their stitched edges and stiff tags that can scratch surfaces. Fortunately, Costco has recently eliminated the tags, but the hard-stitched edges remain a point of contention among users.

Detailing forums are alive with divided opinions. Some users assert that the Kirkland towels can be safe for paint if used properly—emphasizing the importance of sufficient lubrication from a quality car soap, applying light pressure, and caring for the towels like fine linens. Others, however, warn that on softer paint, these towels may cause micro-marring and recommend reserving them for less delicate tasks, such as cleaning wheels and glass.

In short, while the Kirkland towels can be effective for casual users, those aiming for a perfect finish might want to invest in premium options instead. As buyers flock to Costco for these budget-friendly detailing tools, the discussion continues to heat up among car enthusiasts.

As the detailing community grapples with this issue, consumers are urged to consider their individual needs and the condition of their vehicle’s paint before making a decision. The stakes are high, and the right choice could mean the difference between a gleaming finish and an unsightly surface.

Stay tuned as the situation develops, and consider sharing your experiences with these towels to contribute to the ongoing dialogue.