I just bought my 1st bamboo board. I've read on here both ways of cleaning it. Is onw way better than the other? Since this is my all purpose board (no space for more), I felt weird not using soap on it after cutting raw meat. Also, do you wipe dry or let it air dry? How often are you suppose to treat it with oil? I;ve heard anywhere from few weeks to 10 year. So confused, please help.