Sticking cantilever brake

[Soltydog]

My rear nearside brake is slighly sticking on & I can't get it to fully release
I've just had it all off this morning, cleaned, re-lubed & it's still no better. Any ideas? Am I overlooking something simple?

The bikes a Spesh Tricross if that makes any difference.

TIA

 

[fossyant]

Straddle wire pulling too much to one side ? Tension adjuster screws need doing...should be one on each canti.

The brake block's not catching on the rim lip is it ?

 

[Landslide]

If the boss on the frame is corroded, give it a gentle rub down with some wet'n'dry.

 

[TimP]

Is it the brake that is sticking, the lever that is sticking or the cable that is sticking?

 

[Soltydog]

It's the brake caliper that is not 'springing' back to the release position.

Frame's not corroded (only 5 months old)
Tension adjuster screws not having any effect
Brake block not catching on rim lip.
Wire pulling possible, but can't see anyway to adjust this