Hi and thanks for your lovely feedback!
If the refill doesn’t click in properly, try leaving the transparent caps on while pressing it firmly until you hear a click. Before closing, twist the blush all the way down to avoid smudging. Sometimes a bit more pressure is needed at first.
If it still doesn’t work or you think the product is faulty, please contact hi@kessberlin.com. We’ll be happy to help!
Best,
Kess Berlin <3