I'm using a CM Storm Devastator keyboard & mouse combo. Costs like $30, the mouse wheel started to squeal and I had to - yeah, keep reading - remove the slide pads under the mouse to get to the screws. One of the screws was behind the warranty sticker, so it's all void now. I put some extra virgin (oh yes) olive oil to the wheel and its bearings, and it's somewhat silent again.
Though when I built the mouse back together I realized that the adhesive on the slide pads were already dried out. It's horrible to use now, makes a scratching noise against the table and the keyboards space button started squealing too.
Well, that was $30.. But don't even get me started on my headphones and speakers.