because they are not 100% purifies the PET bottles that I use. From raspberry syrup are still traces inside the bottle. I now use a bottle brush and will also, as my Vorrezensenten buy Spülmischentabs. (The bottles are rinsed with me always after use) For purification, fill the bottle 2/3 full with water (40 degrees Celsius warm water), then this is Soda Stream Tab in and shakes until, this tab has completely dissolved. (I thought, I get this Tennis arms until it had dissolved times). Then the tab to 15 minutes in the bottle develop its CLEANING force standing. Finally, after the bottle is turned upside down, thus once again sit for 15 min. Afterwards, rinse several times. And then it did not even produce the desired result. Two points for the bottle was a little cleaner and the syrup smell is gone.
