It's probably due!
One feature of kitchen maintenance that I admit I'm not good at keeping up with is oiling my wooden cutting board. Most sources say you should oil it once a week. Personally, I oil mine whenever it starts to look dry and "thirsty," which works out to about every three months. Mea culpa.
Oiling is important maintenance for a wooden cutting board. Studies have shown that wooden cutting boards are better at resisting bacteria and viruses, because they can't penetrate the wood the way they can a nicked and scratched plastic cutting board, and because a plastic board will hold moisture for longer. But this is only true if you oil your cutting board.
Oiling your board puts a layer of protection between the wood and the world. It helps to repel water, which prevents your cutting board from getting warped damaged, and mildewed. This also helps prevent the growth of bacteria. And the oil itself is a barrier against bacteria getting into the wood.
Always be sure to use the right oil, though. Mineral oil is the way to go. Do not use vegetable oil, olive oil, or any other cooking oil. They will eventually go rancid, which not only promotes the growth of bacteria, it also smells pretty bad.
You can buy fancy cutting board oil at the kitchen store. But all of these products are really just food grade mineral oil. For about a tenth the price, you can buy a big bottle of mineral oil at the drug store. (Tip: it's in the constipation section. Look on the very bottom shelf closest to the floor, where they put all the old-timey cheap stuff.)
To oil your board, first clean it thoroughly and then let it dry completely. Then spread mineral oil over the board in a generous dollop. I pour it on and then wipe it around with my fingers. (You can try using a paper towel, but it ends up being just as messy.) Let the oil sit for a few minutes, then wipe away the excess with a clean cloth. Then flip the board over and do the other side.
I find that there is always some oil left on the surface of the board. What I do is set it atop a bowl to do the other side. This keeps the extra oil from getting all over my counter. Then when I have finished the second side, I give the board a quick wash with dish soap to clean off the excess oil.