Types
Steam cleaning is possible with either a steam cleaning mop or a steam cleaner. Mops have special grooves that reach the areas in between the tiles. If using a steam cleaner, use a nylon brush attachment, which won’t scratch or damage the slate.
Cleaning Process
Before cleaning the slate, vacuum or sweep any dust and debris from the surface. Use a large brush on the top of the slate tiles and then go over the surface again with the nylon brush attachment. You may need to brush away any trapped debris from the grout areas.
Considerations
If you’re hesitant to steam clean the slate yourself, hire a professional cleaner.