Q: The MultiMitts have a magnet, will this demagnetize my ATM/Credit Cards etc. September 09, 2019 19:18 A: They will not have an adverse effect on the credit card. Related articles Q: How do I wash my MultiMitts? Q: What is Coolcore and how does it work? Q: Can I use my PayPal account to place an order on Sprigs.com?