Help Collider Thickness set to 0, but liquid won't touch the walls

[Drengodr]

(Not sure if inserting the images worked, so here are the links: https://imgur.com/VXtaVW5 https://imgur.com/HwNbGdf)
I have attached a picture in order to show what I mean. The drinking glass has a mesh collider and an obi collider, and the thickness is set to 0. Setting it negative makes the fluid fall right through the glass, and setting it higher causes the fluid to be pushed out of the glass or not enter it in the first place. It's possible the error has something to do with the collider settings, but I can't say for sure as I'm still fairly new to Obi Fluid. Any help would be much appreciated! Thanks!