I’ve been using a SBR AC1750 WiFi Router for 5 years now.  Lately it has been “losing DNS”, and it’s getting worse.  I now have to restart it 5-10 times per day.  I’ve spent hours with my ISP’s tech support and changed out my cable modem, and there has been no improvement.  This makes me wonder if my WiFi router is the problem.

It doesn’t matter which DNS server I’m using (ISP vs google vs cloudflare).  But I randomly lose the ability to resolve DNS.  If I know an IP address, I can still communicate with it (ping, streaming video, skype, etc) during the outage. This happens on multiple computers simultaneously.  The only way I’ve found to fix things is to reboot my WiFi Router (and possibly cable modem - I’ll experiment with this soon).  My firmware seems to be up-to-date.

Has anyone heard of this?  Or have any suggestions on a fix?  

Thanks