No internet connection AC1600

I bought this modem/router in January, and it has worked well for the first couple of months. In the last couple of weeks, I keep dropping internet. I have both Apple products and android connected, and all devices experience the drop. I have had Comcast come out and check the line and all is working there. Of course, I am two weeks out from having Netgear phone support, so am on my own. Resetting the modem temporarily fixes the problem, but I would probably have to do this several times during the day if I was using my computer all day. Any help would be much appreciated.