Since I play one-nighters, I refrain from using wireless.
Years ago, I bought a wireless mic. We were playing at a yacht club, and in another room, they were holding a trivia contest. The problem was the house mic and my mic were on the same frequency, and as soon as they turned it on and started shouting “Testing”, we were playing a soft tune in the dinner set.
If our cable goes over an area where someone can trip on it, get out the blue tape.
Notes ♫