Shaman not staying worn in?

[soulspy]

Wash it with hot soapy water, blow it dry and lube it. Sometimes just blasting it with some air will clear the gunk if you don't want to use water.

[jpm2]

Mine just got really stiff, when it was fine after couple days of purchasing. Now it's grinding and won't open without using the other hand. I'm hoping oil will improve this.

What I do 1st.
Go to the sink, put a few drops of liquid dishwashing soap in the pivot, work it open/close a minute, rinse while open/closing, dry, lube.

This usually works for gummed up pivots. Grinding is a little more concerning, and might require disassembly to correct .