Personally, I just ensure that I wash my hands well before I ever play any of my basses.
Of course, the strings go dead eventually - but they last a very very long time.
I have some 6 month old DR Sunbeams on my A4 that still sound great! Still very bright. Actually...I'm kinda waiting for them to mellow out a little

I have no reason to consider changing them yet.
When they do go dead, I'll put on new ones.
I don't like removing and re-fitting strings. I think that affects the tone in itself by bending them around the bridge and tuners, then straightening them when they are removed, then bending them again when they're re-fitted. As well as that the strings wear where they are in contact with the frets, and when they go back on that area is in a different spot too.
Come to think of it...I'm so pedantic, if I remove strings from a bass (even if they're still new) I toss them and put back on new ones.
