Broken zip

[hellywelly4]

Hello. The plastic zip on my favourite jacket has started to stick really badly, and it is almost impossible to move. I know with a metal zip you can use a graphite pencil to rub on the teeth. Is there anything that I can do with a plastic one?
I have enquired at the dry cleaners (they put new zips in), and a new one would cost £30 plus the time it would take, and they don't think they could match the colour. I tried Vaseline yesterday, but all it's done is make a mess!
It's as if it's cross threaded, but I can't seem to straighten it out.

[Old_Geezer]

I'd suggest paying for a replacement zip.

One can get lubricants for plastics, but i'm nsure whether they would mess up the garment's fabric.

[Vicasso]

I had a similar problem and put some 'Mr Sheen' on a cloth and 'polished' the zip on both sides. This also works on sticking plastic curtain rails

[hellywelly4]

Sorry, Vicasso, I tried that but it hasn't worked. Oh well, time for a treat when I next go shopping!

Thanks for your help.