I think Joseph is selling kitchen faucets!!
For the router also try using a 5g connection, so far there is less traffic in the 5g band and more channels to choose.
Also Gary’s suggestion of a WIFI scanner is good. while those apps don’t tell you everything they are much better then guessing.
Are you using any 2.4 or 5g wireless mics in your system? They could be stepping
on your connection.
There is a company who makes a digital IEM system and it operates in the upper end
of the 5g WIFI range, and it did cause me WIFI issues till I changed my operating
channel.