Just like Hook Wash BUT WITHOUT OIL! Hook Wash Blue is safe on electronics, plastics, and bushings, just like regular Hook Wash is. It’s completely safe to use on any embroidery machine, but that’s not all! Hook Wash Blue dissolves grime, adhesive, gunk and old oil while washing dirt, lint, and crud while leaving behind clean surfaces. Use Hook Wash Blue on anything you want clean. Adhesive on the embroidery hoops? Hook Wash Blue will take care of that. Sticky residue on work tables? Hook Wash Blue leaves behind clean surfaces.