Lash serum

For those whose eyelashes don’t ever want to grow anymore.. what eyelash serum worked for you?

I used castor oil for years to get them decently long and thick, tried grande lash for 4 months and noticed no change in volume or length, tried trez and honor for 4 months with no change in volume and length, and now I’ve been on latisse for 4 months(after paying $80 for 3 months worth) and still no change. This was back in December vs now after four months of Latisse. No changes in my lashes and I’m using it every night. Only difference is the mascara used.