Here are five methods to test if a wood pellet is good to use in a grill: Water Soaking Test: Place a small amount of pellets in a bowl of water and let them soak for 30 minutes. If they sink to the bottom and stay together, they are good quality pellets. If they start to break apart or float to the surface, it's a sign that they may be bad or have absorbed too much moisture. Smell Test: Smell a handful of pellets. If they have a musty or sour smell, it's a sign that they may have gone bad. Burn Test: Take a small amount of pellets and light them with a lighter or match. If they produce a clean and hot flame with minimal smoke, it's a good sign that they are still good to use. Ash Test: Burn a small amount of pellets and check the amount of ash they produce. Good quality pellets will produce a fine, powdery ash, while low-quality pellets will produce clumps of ash. Color Test: Good quality pellets should have a uniform color and texture. If you see any discoloration, such as dark or light spots, it's an indicator that they may be bad. Moisture Test: Take a handful of pellets and squeeze them tightly in your hand. If they crumble easily or feel moist, it's a sign that they have absorbed too much moisture and may not burn properly.