3gs Home button

[Jonny1*2]

Well it's basically fucked. It thinks it's permanently pressed down, so when it loses battery and I plug it in to turn it on, it tells me to plug it into itunes. If I turn it on without it being plugged in, voice control activates. I've taken it to bits and tired messing with the connections, and cleaned it out, but nothing. The button physically moves, but that's it.

Any thoughts? I don't want to take it to Apple as they will just charge me £120 for a replacement.