Hi S, I am not a fan of descaling these type of machines unless it becomes necessary. The approach really is to feed it properly conditioned water and nothign else, to minimise the build up of scale in the first place. Do you know if your britta does scale inhibition? If not, then I would recommend you look into something that does scale inhibition. We usually attack scale only when its necessary, rather than do "descaling" as an arbitrary measure at arbitrary times. There is a lot of stuff written about descaling on the www, a lot of it horse poo 😉 with people getting really worried by stuff that they shouldna oughta. Certainly you live in a location that is known for its water problems, but I can assure you it is far easier to apply a simple filtration system than it is to have to descale a machine. It could be as simple as, buying and fitting a filter bracket to the wall about your laundry sink, and running a flexible water line (with appropriate fittings) from the cold water tap to the filter, and just having a flexible pipe running out of the filter that you stick in a jug from which to add water to the reservoir of the machine...and of course it can be a lot more than that too. It can also be a useful drinking water fountain, to fill water jugs. And of course you can install something more technical under bench in the kitchen... Depends entirely on your brief but the point is, it can be simple and inexpensive. The filter needs to be so called "triple action". That is, it does, particles (obvious), odours (eg smell of chlorine) and scale inhibition. At an arbitrary interval, you unscrew the filter and chuck it in the bin, and screw a new one on. Its inexpensive and convenient enough, but there is not much point have a filter system that does NOT do scale inhibition, because that really is the point.... Hope that helps, and if you need any more advice dont hesitate to contact me 🙂