Leek rust

I seem to have rust on some of my leeks. I know there is no cure for this as in a spray, but do I remove the affected leaves or just leave them on the plants?

I usually take off affected leaves as long as it not too many and give the plants a boost feed with Sulphate of Potash watered in and on the leaves too.

Seems to keep it at bay a bit.

Hope that helps 

I did this too and on top of that, when the leaves had dried, I sprayed with a fungicide. I thought it probably wouldn't do any harm and might slow the rust down, but as I only did it last week, I have yet to see whether it works.
According to the RHS, there is no treatment available to us gardeners.

At the first signs of rust , wipe some petroleum jelly over the infected area. It will not kill it but it stops the spores infecting other leaves/plants.