Hello, just wondered how often people clean their machines? I was under the impression that descaling and cleaning cycle only needed to be done when changing the filter, ie, every 3 months or so. But someone at a baby group I went to mentioned that she 'cleans' it every 2 weeks. Not sure if she meant descaling, or giving the water hopper and dispensing area a quick rinse/wipe, or something else. I couldn't find anything in the instructions about cleaning more often than 3 months, but it may be obvious and I've missed it through sleep depravation! Thanks in advance :)