Hi. I bought this DAB stereo radio only a few weeks ago and already the on/off button is faulty, it's sticking and I can't feel the 'click' when I push it anymore. It still turns on and off but there's no movement as such in the button. Also, sometimes when I turn it off it comes on again simply because of the button sticking. Stupidly, I threw away the receipt, at least, I can't find it, thinking I won't have any problem with it. Is there anything I can safely lubricate the button with or spray it with? I mean I doubt I can get logik to fix or replace it with no receipt even though I presume it would have a years manufacturers guarantee. Or can I?