There are a couple of vids on u-tube about this issue. If you type in “triad lock repair”, they’ll pop up. I kept my Mackinac Hunter & Lone Star Hunter open in the 90 degree position for 9 months (not exaggerating). It felt like it may have helped a little, but when I flung my Mackinac Hunter open it locked and I absolutely could not unlock it. The lock bar would not budge when depressed. I had to smack the lock bar against the wooden edge of a table and it unlocked the knife. The issue is probably the steel spring inside.