WhiteTruckMan a lot of household insurances, in the worse case scenario, cover accidental damage, and this is mentioned in the link I posted. I agree though that warranties do not cover accidental damage but they do cover hardware failures.
I admit mine get dunked in a bath and scrubbed with an old toothbrush, being very careful to keep the "business end" of the flex out of the water; then a thorough few days dry off in the airing cupboard; my last attempt actually set off my tower alarm! (keyboard not sufficiently dry enough); the gunk and rubbish that a clean-up finds can be quite alarming; including the odd blob of marmalade stuck down the keys...one kept my O button going for a long OOOOOOOOOOOOOOOOO::)))
I'll be honest with you 513 I only ever took one laptop apart, it was an old one and was a total nightmare reassembling it, it took me hours and a lot of cursing and swearing. After that I honestly would be very wary of trying it again. I'd have a look on the Dell website as they have some good manuals etc and see if theres anything there about your laptop. With any luck it may just come off with removal of a few screws. Heres the website I mean click here