Reddit reviews Trixie Humane Mouse Trap Measurements: 6 x 4.5 x 17 Centimeter

Been there, done that. Easier than you think.

Get a humane trap, set it with a tempting bit of food (not cheese, use nuts or a bit of pork rind or something).

Put the trap against the skirting in a corner. If it's behind something (like a standing lamp) all the better. You want to be able to access it easily without knocking it over, but at the same time have it not so exposed that it'll scare the mouse off.

It'll likely be in the wee hours when it gets caught. As soon as you know it's in there, put the whole trap in a shoe box for easy transport, and release it at least a mile from your house, preferably somewhere suitable (park, woodland, scrubland, abandoned lot etc).

Try to minimise the time the mouse spends in the trap, and don't try to handle it.

They'll always make a bit of effort to try and get out the trap at first, but if it's squeaking like crazy and making a huge fuss it's probably a female with young still on milk. Not that it makes a difference to what you do - it's just something to be aware of.

Set the trap for the next one, as it's unlikely there's only one mouse.

When you've had two days and no trapped mouse (and you haven't seen one running about), then you're clear.

Obviously make sure your house is clean of food waste, surfaces wiped etc otherwise it has no reason to go into your trap.

Also check shoes, corners, boxes etc to make sure it's not using any as a nest or food store.

Oh god that's horrible. Maybe you and your roomates can just get actual humane traps and release the poor buggers elsewhere. Amazon seems to have loads of options that don't kill them:

http://www.amazon.co.uk/Trixie-Mouse-Trap-4-5-17/dp/B000WFI866/ref=sr_1_2?ie=UTF8&qid=1457202888&sr=8-2&keywords=humane+mouse+trap