Need to reboot Xfinity modem every 2-3 days to restore download speeds
I'm on the Gig plan (theoretical gig down/40 up). However, every few days, my download slows to 20-30, but my upload remains the same (40 up). If I reboot the modem, all is back to normal...for another 2-3 days. This is not an issue of the router behind it (I use it for port forwarding, etc) as if I remove it, the same issue occurs. I contact support, they reboot the modem as step 1, and of course, all is well. Any ideas what is causing it, or what to tell support to see if they can resolve?