Aquired a aqua gleam today filled with resin & only been used once. He woz going to chuck it out so asked if I could have it. It's used for car washing of which you connect it same as you would a DI vessel. For you DIY specialists the problem with it is once the ppm goes down (roughly about 30 car rinses) you chuck it. It's a sealed unit but was wondering if any of you have any idea how I can change the resin without breaking the thing. Seems a shame to chuck it once ppm has gone down. Have tried it & water comes out at 003 so it works. Any ideas.