Can't say I know too much about Loctite (as far as I know they don't sell it in the UK where I'm from), but they did point out that each of the screws had a small amount of blue substance on their bottom half. Supposedly this was meant to stop them coming loose, although clearly it wasn't much use...

You get Loctite as a brand in the UK more commonly known as superglue, the other thing you can use is thread lock - somewhere like Halfords will stock it.