I advise you to insert simply by pressing on the nozzle, do without screwing (turns), this will at least somehow increase their service life. The funny thing is that the manufacturer put one spare rubber band on five nozzles. Let's see how they live on, you can, of course, order rubber rings, you know where to put them on) . If you have a Dremel and know how to use it, then I think it will be possible to grind off this sharp bevel, although the manufacturer claims that it is made of titanium. ate after almost a year. The rubber on the handle has stretched and constantly rolls down, at the expense of the rubber bands, if you just insert them by pressing - without screwing, then there are no jambs left, I lightly greased the cartridge inside with silicone.
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