Bikes sitting on often do you clean the chain?



My road bike is so clean you could eat your dinner off it.

But my TT bike which sits on the trainer in the garage all its life has a thick coating of cheap MTB wet-lube which i sometimes look at in disgust… but never quite get around to cleaning. If i spin the cranks it’ll move about 1/2 turn - i figure the watts i’m having to add to overcome this dirty drive train is a good thing and when i eventually clean it i’ll be flying along and my measured FTP will go up 20W.