So my hand brake got soft about a year ago or so, I checked the rear pads all looks good, lines are working and locking the back wheels so I thought ok I just need to adjust the hand break itself. I tightened the line on the hand brake leaver until the back wheels were loosely rotating when down and this helped but didn't provide what it used to. 6 months later same thing so I tightened it again and the lever and it got a bit better. Now it happened again, so wondering whats going on? Are both lines stretching? Even when its adjusted why does it provide such a weak braking power even on the smallest hills it barely works.