hello! The oil on the bicycle chain may be lubricating oil, so you can use the "Blue Moon Dry Clothes Pre-coating Method":

1. When the clothes are dry, apply the stock solution of laundry detergent to the oil stains; Don't wash it immediately after painting, let it stand for 5 minutes, and then wash it normally. If it is not completely cleaned at one time, this step can be repeated several times.

2. It is especially recommended that you use the special laundry detergent for Blue Moon hand washing. The special laundry detergent for hand washing adopts a special formula, and the stock solution can be directly precoated, effectively removing oil stains and leaving no traces.

if you have any questions in the process, you can call the 24-hour service hotline 4-111-1118 for consultation at any time, or visit www.xiyizaixian.com and /c/bluemoononline for online consultation, and we will provide you with 24-hour service!