If you cut open a watermelon and find cracks or hollow spaces in the red flesh, it may simply be a natural condition known as hollow heart, which can develop due to uneven pollination, rapid growth, temperature changes, or inconsistent water availability. The cracks alone do not mean the watermelon is spoiled or that chemicals were used; check the fruit’s smell, color, firmness, mold, and overall freshness, and discard it if it is slimy, moldy, badly discolored, or has a strong sour or fermented odor.
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