Hello! First time hot tub user of 2 months. In the last month the water has gone green overnight. We fixed it, but now we notice a dirty foot/sock smell on our skin after use. We have been changing the filters every couple of days. We are using Aqua Easy Shock, Spa Life Sanitizer, Spa Life Shock. Test strips show levels are where they should be. We use it daily for about an hour, and we chemical after use with cover off for about 40 min. Should we drain the water and start over????