Unfortunately I am beyond the return date by a couple of weeks. I bought these to be ready when needed.
I tried to change out the cartridge, but it did not snap into place. Thinking that was a fluke, I tried a different cartridge. (There were four in the package.). That one didn’t fit either. Not even going to try the other two.
I guess sometime you just get what you pay for.
Edit to add that the company reached out to me and offered to send another package or refund. I did choose the refund because I had already found a brand replacement, and one cartridge will last me quite awhile. But most likely I will give them another try in the future.