C6300

Is it only wifi dropping? or do wired devices drop as well? 

Have you noticed if its both wifi channels or just 2.4gh or 5ghz?

When it "drops", what actually happens? Do devices say "connected, no internet", do they disconnect from the wifi and not rejoin, does the wifi stop broadcasting entirely? 

Details are key. the more you can tell us, the more we can help you. 

Also, do you have a screen snip of the cable connections page and event logs? that helps check your isp line