Did you know that washing your Dyson V15™ vacuum filter at least once a month retains optimum suction power? Here's what to do once your screen alerts you that the filter needs cleaning: 1. Remove the filter. 2. Tap it lightly to remove any dust and debris. 3. Wash it under cold water, gently squeezing the filter until it runs clear. 4. Fill filter with water and shake firmly to release trapped debris. Once emptied, shake again to remove all water. 5. Leave to dry in an area with plenty of airfl