I tried adjusting the brake according to the instructions. Took off the lever and rotated the spindle till it was tight then losened it a bit then put it back together. Then did the adjustments on the cable till had just a tiny bit between the lever and stop. All worked well for a while. Would hold and release just fine. Then went for a ride and went to put the brake on at a gas stop and it would not engage at all. It would just go down and fly back up all the way. Did this for a couple of gas stops then the last two times at the mailbox and home it worked really good again! What adjustment am I not doing properly? Oh and I did wd40 the lever at the bolt joint. Hope someone can help.