Oh yeah. I know this routine very well. I do it all the time actually.
My problem is actually a physical transport issue. Whenever it's been raining for a while or after a heavy rain we get issues with the net and the cable. On Demand won't work or it will work then will error out. The TV display gets glitchy and warped periodically while trying to watch any program.
The NET will completely not work during these times even if taking the home router out of the loop. It just won't connect and packet tracer will show no packets coming in from Comcast.
The previous city I lived before Snoqualmie actually had EXCELLENT connectivity. Never once had a problem, but where I live now has been bad for years. Comcast refuses to fix it. I've had them come out and they say everything is proven good with their equipment. They won't do any further investigating and they tell me if I want them to check out the cable from the outside box to my apartment, then I will have to pay their maintenance fee to do the work, with a minimum four hour charge, I have to pay to replace the cabling in the structure and whatever other fees might be incurred.
I've been battling this for years. For one, I live in an apartment building and I don't own a single bit of the cable inside the walls. Second, I'm not allowed to have anyone or myself work / replace cable inside the walls. This is the reason I can't get satellite TV. No drilling is allowed. And the final kicker. The apartment complex management will not pay for any cable work to be done because Comcast states everything is just fine.
My only option is to move to another city. They've tried to charge me hundreds of dollars for callouts because they found nothing wrong. This is for cable TV outages and net. By the time they'd arrive, the problem magically disappeared, while in the meantime I've gone 48 hours with no service I was left to pay for, an ordered on-demand movie I had to pay for but never got to watch and they tried to get me to pay their fee for not finding anything wrong with their equipment. LOL. I've never once paid any of those fees because I fight it out with them.
Everyone in my apartment complex suffers the degraded service at the same time I as me. Comcast just refuses to admit it's more than a case by case problem. Since we have to alternative options we are left with either no internet or TV or use horrible spotty Comcast connections.