Surely that means you should also be out for the day too, on the bike?
Having re-done our kitchen last year, I can't imagine ever being allowed to bring something grubby in it. That said, I have a garage pretty much dedicated to my bikes and their maintenance. I spent some time on Wednesday scratch proofing my rack to accept a new steed and even then the bits it gets hung up by are also wrapped.
The good bike gets kept indoors, but that doesn't go our in the wet, so shouldn't ever get 'that grubby'
Enjoy your day tinkering.
And there is nothing wrong with Radio 4, I have been a listener for a number of years, I am only 35.