Before using the cleaner for the first time, make sure it’s fully charged. Besides that, please remove sharp objects, glass fragments, small toys, pins, paper clips, stones, plaster, large pieces of paper, etc. from the floor as they may cause blockage or damage to the unit before operating the Cordless Wet & Dry Vacuum Cleaner. Also, fill up the Tank for Clean Water with fresh water and make sure the Tank for Used Water is emptied prior to operation.