I put it in by the tablespoon full slowly but it turns into clumps. Any way to avoid the clumps ?
I challenge you to skip the polish and let the vibrating cleaner (crushed walnut) do it's work for a minimum of 2 1/2 hours. Don't forget the used dryer cloth to help collect the soot.
I have tried nearly everything I could think of as a tumbling media (beach sand, rice/dried beans, pet litters, cat litter....