If it’s cutting out then you have to take it apart and clean everything with lab-quality alcohol (Isopropyl Alcohol Lab Grade Rubbing IPA Disinfectant).
# Unscrew the battery and remove it.
# Remove all extension tools, the filter, and the dust collection chamber (click to open the bottom and hold it down, pulling the chamber down).
# Clean the chamber/bucket, the suction head (remove the roller, etc.), pour alcohol into where the filter should be, and shake it. Use cotton buds for hard-to-reach dirt and a toothbrush for the main cleaning.
# Once everything looks brand new and shiny, let it dry for a few hours.
# Turn on and boom it explodes - joking, it will be as good as new (sorry Dyson). I do this every year and have no problems.