Featherweight Case Deordorizer This product claims to be the best at eliminating, (not just covering up) all organic odors - including, but not limited to the Singer Featherweight Case. Spray, pour, or wipe directly on the source of the odor. There are approximately 200 squirts per 1 oz. bottle, but it is highly concentrated and even a bad smelling case would only need a few squirts. For mild odors, one or two squirts will suffice, but for stronger, moderate smelling odors try 3-4 squirts. Close case lid and let sit for a couple hours. Repeat as necessary. For extreme musty-smelling cases, please review the Featherweight Schoolhouse tutorial regarding case odors for additional odor-eliminating techniques. Highly concentrated, eco-friendly, odor neutralizer! From The Featherweight Shop. While this is a non-hazardous, environmentally friendly product, the manufacturer still provides some common sense warnings below. 1.) Keep out of reach of children.2.) Avoid contact with the eyes.3.) Use in well-ventilated area, as it may be irriating or harmful if inhaled.4.) Keep away from all food, drink and animal feeding products.