sticky keys :(

Every week it seems a different key gets stuck - does anyone else find this? Right now it's the left ⌘ key, last week it was the \ the week before it was the space bar. Is there some issue with the butterfly mechanism? I really try to use clean hands and not get crumbs in the keyboard but something there is jamming the key. The fix is to blow/suck around the key quite hard but this is not really what I expect to have to do with a premium laptop like this.