@AntonioM - I’ve never spent any time cleaning any of my strings. I wipe them down every so often with a clean microfiber cloth, but for the most part I kinda go by the words of James Jamerson when it comes to strings… “Without the Gunk ya got no Funk!” 
I do (and even more so now a days) wash my hands before playing any of my stringed instrument - especially after chowin’ down a big juicy hamburger and a side of crispy fried potatoes! 
I think I would be a bit careful on what to use on strings though… One thing you really don’t wanna do is use something that will break down the adhesion between the inner core and the wrappings of the strings.
Keep on Thumpin’!
Lanny