My bathroom extractor fan makes a lot of noise, mainly a high pitched wailing screaming type of sound. I've taken the front off, and there's a lot of paper jammed into it, maybe the previous tenants trying to drown out the noise or maybe this is what is causing the noise? There appeared to be a live wire there which i didn't want to get too close to so i put the front back on and left it, should i pull the paper out, or get someone round to fix it or can i replace it myself? At the moment the noise is too loud and unpleasant to ignore, any advice would be great.