Hi,
I really love California PETG. I used to have all kinds of issues but since using California PETG it has become my go-to-no-brainer filament.
I have found this on Printables from Adam L and it was very helpful in printing clear filament on my Bambu X1C and my Prusa MX3. https://www.printables.com/model/613741-print-glass-with-your-bambu-x1x1ep1sp1p-printer-or My pieces came out very clear and strong. I have found that speed had the most impact.
In fact I have downloaded and used all of Adam L's profiles and use them as my starting profiles for all filaments not just the specific brand in his profiles.
Good Luck,
Tom