Default Bad wifi. Which wifi antenna replacement?

Hi

I have a Nurvo rockchip stick with ridiculous bad wifi reception. It's not the common ground short problem. When I opened it up it turns out it just has two spring loaded contact points (red circle) against the wifi antenna in the cover. I tried to fit an iPhone 5 antenna, but didn't manage to separate the core antenna from the shielding.

Anyone have a tip for an easy (relatively) antenna to solder on? (cheap off ebay preferably)
I've read somewhere about a contact glue that can be use instead of hot soldering. Anybody have any recommendations.

Really need to better the wifi reception, if not it is practically useless.
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