I got my Yocan Uni today and when I tested it out for the first time I noticed that adjustable height slider is really hard to move. I have to push really hard with my nail in order for it to move up and down. Everything else seemed to work correct though.

I was wondering if it is supposed to be like that or if something is wrong with my unit?

Sorry for the inconvenience.
Please try to drop a little of iso. (Not drop too much)
If still hard to slide, please can you upload a video about your device.
I will forward it to our engineer team.