1、长时间不对饮水机进行专业深度杀菌除垢清洗； 1. Do not sterilize the water dispenser professionally for a long time; 　　2、换水造成进水口与空气接触； 2. Change water to cause inlet and air contact; 　　3、存放空间狭小或不洁,空气不对流,地面不常清洁； 3. The storage space is small or unclean, the air is not convective, the ground is not always clean; 　　4、气温不适当,置于阴冷潮湿或阳光直射处,易导致细菌繁殖； 4. The temperature is not suitable, and it is placed in a cold, wet or direct sunlight, causing bacteria to reproduce. 　　5、饮用水质不合格或含菌； 5. Drinking water quality unqualified or containing bacteria; 　　6、饮水机保养不够好,密封性差造成细菌入侵； 6. The water dispenser is not well maintained, and the sealing difference causes bacterial invasion. 　　7、水胆存水过多而长期不饮用； 7. Water urchin is too heavy to drink; 　　8、长期不断电“久烧”（企业和事业单位基本上不断电，饮水频率很高）； 8. Long-term continuous electricity "long burning" (enterprises and institutions are basically continuous electricity and high drinking frequency); 　　9、用带化学成分的药物清洗（送水员或自己）； 9. Wash with chemical ingredients (water bearer or yourself); 　　10、不在水质保质期内，饮用完； 10. Do not drink the water during the warranty period;