sur Ali express ou Geek, tu peux acheter 2-3 brosses pour quelques dollars
https://fr.aliexpress.com/item/Plastic-Cycling-Motorcycle-Bicycle-Chain-Clean-Brush-Gear-Grunge-Brush-Cleaner-Outdoor-Cleaner-Scrubber-Tool/32697081473.html?spm=2114.06010108.3.10.0RGd9d&ws_ab_test=searchweb0_0,searchweb201602_3_10065_10068_10501_10503_10000032_10000025_10000029_430_10000028_10060_10062_10056_10055_10054_509_10059_10099_10000022_10000012_10103_10102_10000015_10096_10000018_10000019_10052_10053_10107_10050_10106_10051_10000007_10084_10083_10080_10082_10081_10110_10111_10112_10113_10114_10115_10000041_10000044_10078_10079_10000038_429_10073_10000035_10121-10503_10501,searchweb201603_9,afswitch_3,single_sort_2_default&btsid=ceda37ab-adec-4e07-831a-cf15fc04ede1