Let your WAP (aka your “router”) handle the channel selection. Yes, you can actually make the problem worse! The problem with selecting your own channel is that the WAP won’t automatically switch to another when the one it’s manually configured to use becomes saturated with traffic.

So, what you “capture” today and determine what’s the best channel now might change the next day or even later that afternoon! Bluetooth devices, wireless peripherals, our phones and devices are all crowding the airwaves. Modern WAPs (wireless access point) auto select the best channel for you based on existing traffic and this can change continually given the explosion of wireless devices which we are using every day.

Unless you’re using a 10+ year old WiFi router that doesn’t handle automatic channel switching well, there’s no need to do this. Trying to find which channel to use is pointless nowadays. There are many apps that you can use from the built in Network Diagnostics to commercial grade WiFi mapping and analyzers.