After using the gourd for a period of time, we must regularly clean the chain on the gourd to ensure the safety of its use. First of all, do not damage the chain during the processing process. You cannot use corrosive liquids to make the chain crisp, do not make the chain temperature too high, and do not make the alloy metal elements of the chain. Secondly, to ensure that sufficient light should be ensured when checking the chain, and each chain ring must be checked. Focus on checking the chain ring deformed, scratch, corrosion, and inner ring wear. Finally, look at the wear of the contact point of the chain rings. Sometimes the inspection will cause the chain to relax. If the wear is seriously found, the relevant tools can be measured. It can be compared with a new chain ring to see if the wear is serious.