I am a total clean freak with my kitchen sink.
My house is over 25 years old, but the drain pipe is white as you look in the sink.
I use 'Magic Sponge' to clean inside the sink 2-3 times a day when I wash up.
I also leave the tap running a few times a week for a minute or two to clean away any old water.
I bleach my 'drain pipe' with the very heavy duty bleach.
I never have a dirty dish-wipe....and the sink is wiped down 2-3 times a day.
Along with the dish rack.
I have about 2 dozen tea towels, and once one is used...it go's in the wash.
(they are all washed separate from any other washing).
That is one area I am totally a freak with, I just can't help myself.