Put a small amount of lemon oil on a microfiber rag and wipe your instrument and fretboard then look at the rag.
It cleans.
The same is probably true of mayonnaise, but I'm not cleaning my instruments with it.
Hmmm... I smear my ukes with peanut butter and then let my dog take it from there.
The same is probably true of mayonnaise, but I'm not cleaning my instruments with it.