RE-zero tips not fitting?

[Borkil]

So I got Hifiman re-zero a few months ago. Sound great and came with a bunch of different tips. However I can only get the 2 clear bi flanges ones to fit and not the others. I tried for 20 mins trying to get the others ones on and I think the hole is just too small. Anyone else have this problem? Also the 2 tips that do fit don't really fit in my ears well. Do you guys know of some other tips I can buy that would fit?