Mains Filters... do they work?

[Stuart Wyatt <stuart@solostring.com>]

Hi all,

I'm trying to find a unit that will clean up any mains 
interference/noise on the circuit at home (I live in a small apartment, 
with lots of gadgets like neighbours fridges making strange random 
noises). Has anyone had any experience with units like this? Do they 
work?

Just a random question :)