What are the reasons for an automatic mechanical watch being inaccurate?

　　Full automatic mechanical watches are elegant and highlight one's stature. Nowadays, more and more people enjoy wearing them. However, you may encounter an issue: the watch is not keeping accurate time. Let me provide you with the answers below!

　　Reasons for inaccurate timekeeping in automatic mechanical watches

　　Firstly, there may be quality issues with the watch itself, such as a failure in the automatic winding mechanism or the rotor, which can cause inaccurate timekeeping.

　　Secondly, there are issues related to consumer usage. The former can be determined through testing by relevant national inspection departments; if it is a quality issue, the merchant must provide a refund, exchange, or repair according to regulations. The latter depends on the specific circumstances of the consumer's use, such as who is wearing the watch and the environment in which it is worn.

　　Reasons for inaccurate timekeeping in automatic mechanical watches caused by consumer usage include the following:

　　Insufficient physical activity by the wearer can result in the automatic watch not being fully wound, leading to the watch running slow or stopping. This type of watch is not suitable for the elderly or those who work in offices and have low levels of physical activity.

　　Exposure to magnetic fields, such as those from televisions or mobile phones, can cause the watch to keep inaccurate time.

　　Maintenance methods for mechanical watches

　　1. Frequently use a relatively soft cloth or silk to gently wipe away dirt and sweat stains on the case.

　　2. Manual-winding mechanical watches should be wound at a fixed time, preferably fully wound at one go. When turning the crown, the speed should be moderate, and do not wind it too tightly. Over-winding can easily cause the mainspring to stick to the oil in the barrel. When the mainspring relaxes, it can easily break due to excessive elasticity.

　　3. Watches are most sensitive to violent vibrations. It is best to take it off when playing ball games or hitting things with your hands, unless you are sponsored by the brand like the person below.

　　4. Watches are also susceptible to water damage. Therefore, it is best to remove your watch when washing clothes, washing hands, or doing other work that involves contact with water. If fogging or water droplets appear on the watch crystal, it should be serviced promptly to wipe away the moisture and dry the movement. If you find fogging or condensation droplets on the watch crystal, please pull the crown out, place the watch face down for a day, and then push the crown back to its original position to resolve the issue (the occurrence of this issue does not mean the watch's water resistance has deteriorated; it may be that the crown was unintentionally pulled out from its original position during use).

　　5. Please keep the watch away from magnetic objects such as radios and televisions to avoid affecting its accuracy.

　　6. Please do not allow the watch to come into contact with solvents, mercury, cosmetic sprays, detergents, adhesives, paints, or camphor, otherwise the case and strap/bracelet may discolour, deteriorate, or become damaged. Camphor is a highly volatile substance that can easily cause the movement oil to solidify, losing its lubricating effect and thereby damaging the accuracy of the timepiece.

　　7. Do not expose the watch to sudden cold or heat. Extreme temperature changes will increase the timekeeping error of the watch. The mainspring inside a mechanical watch is prone to breaking due to rapid temperature changes, and the rubber gaskets will age faster, which will also affect the watch's water resistance.