What is the contact number for dirt devil? Dirt Devil Customer Service Phone Number. The Customer Service Phone Number of Dirt Devil is: +1-800-321-1134. Dirt Devil is the company that designs and manufactures a wide variety of household vacuum cleaners and floor care products. This company retails its products under the name Dirt Devil.How do you clean a dirt devil? Clean the hoses and brush roller If the vacuum isn't picking up dirt after heavy use, remove the attachment hose, and clean it thoroughly to remove blockages. Remove and clean the roller brush, and check the small hole that leads to the vacuum bag from the roller brush for debris.What is dirt devil? Today Dirt Devil is the main brand, but the company continues to manufacture the "Royal" line, as more expensive and of a higher quality product. The corporate legal name is the rather anonymous "TTI Floor Care North America".