Purple Patch Bike Cleaning Demonstration May 30, 2019 17:04 Updated Follow Not signed in? Log into your Purple Patch account for full access to your education program for coaches and athletes. You need to sign in to view this page. Friday, June 30, 2017 This video on the 101 on how to clean and maintain your bike. A dirty bike can reduce your power by 3-4 difference. It is worth your time. Tools and tips to keep your bike in top shape.