Do not spray electrical contact cleaner into your T610 mobile, because depending on where you point the bloody nozzle you will fuck up the LCD.

One disassembly (and thorough cleaning) later, the original reason for using the contact cleaner (a sticky joystick) is gone, but the LCD turns out to be encapsulated just badly enough to let the cleaner crap enter. Disassembly of the LCD+backlight unit? sure! Getting the gunk out and reassembling it into working state? not so likely...

Replacement LCDs go for AU$30 on ebay, complete T610s for a similar amount...