Innov-is 2500D FAQs & Troubleshooting Innov-is 2500D Not your product? Sort by Updated Date Popularity 2 Results 1. 05/14/2015 How do I clean the race? 2. 04/23/2009 How to clean the bobbin case(pink marking or no marking) when using a prewound bobbin. Maintenance FAQs & Troubleshooting