This sounds so ridiculous that I hesitate to bring it up. I recently received an order of white blank cartos instead of my usual black, and I got them from a vendor I have never tried before, but the vendor seems to be a trusted one here. They are giving my juices a chemical taste that I have never tasted before. I just did a comparison with one brand new black carto and one brand new white carto, and I filled them both with the same exact juice. The black one tasted perfectly fine, and the white one is not good. Has anyone else experienced this? I'm wondering if I need to rinse all the white ones out thoroughly before using them anymore, or if I shouldn't be using them at all.