#1 don't use detergent or soap on a wooden cutting board.
#2 To clean a wooden cutting board, simply put a tablespoon (or so) of salt on it (table salt, Kosher salt, doesn't matter) and just enough hot water to make the salt pasty. Scrub with a plastic scrubby (like one used for pots and pans), NOT a metal or steel wood pad. Salt and hot water. That's it.
Dry immediately and stand on edge so air can get all around until completely dry.
After cleaning, wipe it with a microfiber cloth with mineral oil. (I keep one in a zip-loc bag in the cupboard).
Once a board is THOROUGHLY oiled, it doesn't need a LOT of oil to refresh it, UNLESS you use soap or detergent on it. Boards that get cleaned with soap/detergent will eventually crack or warp because you're driving out all of the oil, sucking up water, drying again and then oiling. Swell, shrink, swell, shrink a lot and to a high degree of movement. Those boards will get trashed.
Wood is like human skin. When it's dry, it will absorb the first liquid it can when it comes in contact. If that first liquid is water, then that's what it'll absorb. Using detergent strips the oil and lets the water in (because you've removed the oil). Mineral oil does not go rancid. Vegetable and nut/seed oils can. Tung oil will polymerize before it ever goes rancid so it's still ok as a choice. (PURE tung oil. Not that abomination they sell in the big box stores that may have no tung oil in it at all).
Safest: Mineral oil
Cleaning: SALT and a tiny bit of hot water. That's it. No detergents
I rant about this whenever I see these threads and I apologize to those that have heard it before, but I have DECADES of experience with wood cutting boards (I am a passionate cook as well as a wood worker and artist…hehehe). Seriously. So forgive me if I'm a bit passionate about them.