If your chimney cap is not gunked up with creosote is it a good sign that your chimney is fairly clean? I am afraid of heights and my 3 story roof has a really steep pitch, so getting up there and checking it isn't really an option. Looking at it with binoculers, it looks like there is no build-up in the slots in the cap. I run my flue temp. up to 600-700f for at least 1/2 hr. everyday and it's still drafts like it did after the last cleaning in September.