I have a dual wifi system with one 2.4 GHz frequency and another 5 Ghz. I get close to 30 Mbps on my LG TV on either. But once I switch off the TV and turn it on after 12 hours or so the internet slows down to 0.3 Mbps. The only that works is to reconnect to another network and the speed returns back only to have the same process repeat. Any way to fix this problem?