The biggest problem people have with vacuum cleaners is that they lose power over time. I estimate 90% of these could be fixed with general maintenance.1. Remove all hoses and run a garden hose through to give them a good clean.2. Remove the brush and clean all threads, hair and unidentified substances.3. REPLACE BELT.4. Replace bag.5. Clean and/or replace air filter.6. Check and unclog the vacuum cleaner itself.7. Give the whole vacuum a good clean to keep it looking like new (maybe even use some wax). Reassemble and done.