I picked up a set of three Totally Bamboo cutting boards on sale at Sur La Table recently. I washed and oiled each one with mineral oil, and after one use, the first one I used already shows cuts from the knife. I usually use plastic so I'm not used to wood boards. Is this normal or because I didn't oil daily for first week as recommended on Chow board (found recommendation after the fact)? Is the first one ruined? I am now oiling each one each day.