Question about Roborock S7 MaxV

Great device. It's impressive what it does right by itself. What about the cleaning fluid? It has to be the original Roborock product, otherwise you risk losing the warranty. Where do you get it from? Only via AliExpress from China with 25 CHF shipping costs? That would hardly meet your sustainability guidelines. May I hope that you will release a commercially available product from your parent company for this purpose? That would really be good customer service :-).