Cut the ends of the watermelon Start out with a nice watermelon. When you tap the melon you should hear a hollow sound. Sometimes it helps to put your ear against the melon to listen. The patches on the rind from bugs are a good sign.
Bugs know how to pick the best melons.
Watermelons retain less pesticides than other fruits. This watermelon was late in the season. The clover like growth of seeds should be more obvious. Slice down the whole length. Not too deep.