How do I fill the clean solution reservoir on the Dirt Devil Spot Scrubber?
Fill the cleaning solution reservoir with approximately 112 oz of Dirt Devil Carpet & Rug Shampoo, then fill the remaining space with hot tap water. Replace the cap securely after filling. Only use Dirt Devil Carpet & Rug Shampoo, as other cleaners may cause excessive foaming and void the warranty. (Page 2)
From the official Dirt Devil Spot Scrubber manual, page 2
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