turn off Parental Control

I'm on Comcast Xfinity and was using the Netgear/OpenDNS Live Parental Controls for content filtering (https://netgear.opendns.com/sign_in.php). I'm not sure when the content filtering stopped working.  Now I'm trying to switch to OpenDNS Home. I have already signed up for OpenDNS Home and configured the settings there but my clients are still using the Comcast DNS addresses (75.75.75.75 and 75.75.76.76) so the OpenDNS Home filters are not working. When I log into 192.168.0.1-> Advanced-> Setup-> Internet Setup-> DNS, it shows the two OpenDNS DNS addresses (208.67.222.222 and 208.67.220.220) there. If I try to edit the DNS addresses, it says "The DNS Server setup will not take effect due to Parental Controls is enabled. If you need to configure DNS manually, please disable the Parental Controls". I looked around but don't see any place to disable Parental Controls when I'm logged into 192.168.0.1. I logged into https://netgear.opendns.com/sign_in.php and set the filtering level to None and removed everything from the Block List/Allow List but the admin site, 192.168.0.1 still says Parental Controls is enabled.I installed the Nighthawk App on the smartphone but the app says my router is not supported. The current firmware on the C6900 is V1.01.35. Does anyone know how I can disable the Parental Controls so I can use the OpenDNS Home filters? Thank you in advance.