Undo the small screw on the bottom until the lever slides out the side (no need to completely remove the screw as it engages in a slot).
The piston may catch on the cutout on the lever if it does just press the piston in with something suitably small.
Remove the piston and spring (
do not lose the screw or spring)
Thoroughly clean the piston and cylinder - I used a cotton bud soaked in Isopropyl alcohol.
When dry smear the inside of the cylinder and outside of the piston with a film of Araldite
resin.
Do not fillReassemble
Bingo one working lift - mine did
