...I clean my reusable bottles with simple old-school gal soap. You can get it in a liquid form or simply buy a soap bar, grind it and make a liquid with some hot water. Soak overnight in a bowl any bottle that you need to wash, next day you rinse them and pour some alcohol inside just to disinfect and let them dry. I find that this method breaks all the leftover perfume residue and gets rid of the leftover smell. I hope this helps, best of luck 👍👍👍