If you took yesterday's advice to reposition your speakers to be more parallel with the rear wall, I have another task for you today.
This is even easier but has a very positive impact too. Physically unplug everything in your setup: AC cords, interconnects, speaker cables. Do them one at a time then put them back so you don't have to think a lot about where they came from.
What you're doing is scraping the oxidation off the connectors, the pollution, whatever has accumulated on the connectors and plug.
It's even more effective than washing your car, something we all acknowledge makes it run better.
And, if you want to thrill your spouse, do a little dusting and vacuuming too.
Then, kick back and enjoy the music for me.