Oh, I get it. So do I. And an intermittent problem, like only when it rains, makes it more difficult. But unless you are getting water inside, like in a crawlspace or a basement, and there's a connector getting wet, you can be sure that the issue is on their side and not yours. Give them one dispatch, then escalate. Most cable companies have people who handle the difficult stuff. They're not necessarily better than the others, they just are allowed the time to find and fix the problem.