If your bokashi batch started to smell or produced blue or green mold, there are several potential causes. It’s possible that your lid wasn’t properly secured or that food scraps were too large and could not properly ferment. Other possible reasons include: · Your bucket was too wet. Remember to regularly drain off any liquid in your bucket. · You didn’t add enough bokashi bran. Anytime you add food scraps to your bin, always top them off with an additional sprinkling of bran. · There was too much air in your bin. This could be caused by an improperly fitting lid or by not pressing your scraps down firmly with a piece of cardboard or waxed paper.