Remove and spray cartridge filter with garden hose and re-install
Remove and clean skimmer basket
Add shock/oxidizing agent
Inspect union connections for o-ring and gasket leaks; tighten if loose
Clean stainless steel controls
Soak your filter cartridge in a filter cartridge cleaning solution. Rinse thoroughly and, if possible, allow to dry before re-installing. York Region Hot Tub & Leisure recommends purchasing a second filter so that while the first is cleaning, the other is clean and ready to install.
Drain hot tub at least once per quarter and clean the acrylic shell surface with a non-abrasive cleaner designed specifically for acrylic surfaces.