Break from Tradition, Cut the Bottom Butt
It sounds silly, right? Though most people traditionally carve a pumpkin by creating a circular cut at the top around the stem, this is actually the wrong way to keep your pumpkin fresh after carving. Instead, cut a circular hole at the bottom with a serrated pumpkin carving knife, and gently pull the interior seeds and flesh out the hole. A bottom hole allows moisture to remain inside the pumpkin more than a top hole. Leave a 1-inch thick wall around the inside of the pumpkin after you scoop everything out. A thicker wall that you take care of takes longer to dry out.
Rub-a-Dub-Dub, Stick Your Pumpkin in the Tub
Once you finish carving your favorite pattern or design into the shell, give your pumpkin a special bath. Mix 1 tablespoon of bleach** per 1 gallon of water in a large bucket, sink, or bathtub. Soak the pumpkin for at least 45 minutes. The bleach solution helps to prevent mold from growing on the interior and exterior of your pumpkin.
**If you want to add a good smell to your pumpkin and eliminate some of the bleach smell try and Sprinkle some cinnamon and nutmeg on the inside and light the candle.
Drown Your Pumpkin
When you display your pumpkin outside, the moisture escapes, quickly causing the pumpkin to shrivel. Once you see this happening, give your pumpkin a water bath. Allow it to soak up as much water as possible. One way to tell if the pumpkin has enough water is to lift and feel its weight. The heavier the pumpkin, the more water content it has. Use water in a spray bottle to spray the pumpkin every day to help keep the moisture content high.