Charles, thanks for the reminder that it's also time to clean all electric contacts. Despite how good all my TWL cables and Uberbuss are, a good cleaning every 6 months or so works wonders.
A friend of mine passed away some years ago and Gayle and I kind of took her under our wings for a while. About 6 months after Ken's death, she called and said she wanted to sell his Naim system because it was sounding bad and didn't want to face repairs.
I went to her home, listened and cleaned every contact and tightened the binding posts on the speakers. Instant smile on her face. 😁
Once again, I R&R every receptacle and switch in our home at least once a year, usually twice. Most residential fires are caused by loose connections drawing too much current, baking the insulation and heat charring the framing. Bad ju-ju.