I have a Garden Spa Hydrangea which came with the house when I moved in 3 yrs ago. Not sure of the age. I didn't notice an issue the 1st year we used it, but last year and this year some of the jets seem to be hardly pushing any water through. I drain it and clean it every spring, and refill it in the fall. I don't think it it's an airlock, as the pump is making it's usual sound, and some of the jets work OK. I can feel some water coming out of the jets but there's hardly any pressure behind it, and the water doesn't get very turbulent, even with the air valves open. The filter is brand new (replace it each year). Is it possible multiple jets are clogged? And if so, would it completely block the water and/or air coming out? Just wondering whether I have a jet problem or a pump problem. Also, if the jets are clogged, can I remove them and clean them one at a time with the hot tub full or do I have to drain it?