Joe,It's the only way I know of, and I think it's the way their tech rep told me to do it. I don't think I've been deleting anything but the contents of the cache when I do it, but I couldn't swear to that.
I usually clear my cache about two or three times a day, depending on how many sites I visit. And I have to sign off and then sign back on again before and after. Otherwise, my computer can't find anything.
I have to do it frequently because my computer starts to sieze up after I've accumulated about 100 to 200 thingies in my cache.
Carol