R.M.
Oh my, oh my don't use bleech...it is so harmful for one and if you ever touch the jack-o-lantern wouldn't it rub off on you. I heard but have not tried it yet as my pumpkins await carving but to use a vinegar and water mix...one part water one part vinegar. With this spray inside and out and all cut areas. I am so excited to try this once mine are carved. Acutally i don't own bleech and would not use it on something I would be around...lighting the candle each time. Best of luck on preservation!