Tube/pipe cleaning?

[Gingerbrews]

Got out one of my plastic tubes to rack a brew, when i noticed that inside the tube is some mould or gunk.
Poured boiling water through with no effect; trying some Starsan too but it's not going.
Any ideas or do I just bin it?
I know the cost is small but it means I'm going to have to go to LHBS to replace and it's miserable outside!

 

[Bigcol49]

Hi!
Bleach? Wizz Oxy (or PBW if you have it). If you could "block" the ends of the tube and leave the liquid in for a while, it gives it a chance to dissolve the crud.

 

[JapanBrew]

Bleach. Just soak it then rinse well.

 

[Gingerbrews]

Cheers.
Will give bleach a try