Woman Pays $4 for Undercarriage Wash, Gets Crucial Winter Car Care Tip

Massachusetts-based content creator Ashley Esper shared on TikTok her experience of being persuaded by a car wash attendant to spend an extra $4 to clean the underside of her vehicle. The video quickly went viral, amassing over 1.5 million views. Initially hesitant about whether it was worth the cost, she soon saw the comments section transform into an impromptu “rust prevention lesson.” Numerous car owners and mechanics pointed out that in regions where salt is used to melt ice during winter, salt and slush accumulate underneath vehicles, significantly accelerating corrosion that can damage brake lines, suspension components, and even the frame itself. According to AAA, road de-icing agents cause approximately $3 billion in vehicle corrosion damage annually, with average repair costs nearing $500. Many commenters shared painful stories of major mechanical failures resulting from neglecting undercarriage cleaning. Experts recommend washing the vehicle’s underbody every few weeks during northern winters—this small expense could potentially prevent thousands of dollars in repair bills. As one user aptly put it: “That might be the best $4 you’ve ever spent.”