1. Do not use the kits beyond the expiration date. 2. Please don’t touch the membrane on the strips. 3. Slightly remove the microwell sealer to prevent the powder from drifting from the wells. 4. The sample to be tested must be a homogeneous liquid that cannot be agglomerated, fermented, rancid precipitated, etc., and cannot be colostrum. 5. Avoid direct sunlight and direct blows during testing. 6. Do not re-use pipette tips, test strips, or microwells. 7. The unsealed microwells should be used within 1 hour. 8. Do not take tap water, distilled water, or deionized water as the negative control. 9. This test method is just used for rapid screening purposes, if positive results appeared, please verify them by a quantitative method. 10. Considering that all materials, containers, and devices exposed to the sample are contaminated with a harmful substance, please wear protective gloves and safety glasses while using the kit. 11. The components in this test kit have been quality control tested as a standard batch unit. Do not mix components from different lot numbers.