https://www.mapleairbrushsupplies.com/collections/cm-sb-parts sometimes when I unscrew the complete head system from my airbrush it goes quite hard. Looks like it get stucked to the I-580-2 . If I put drop of reducer in my airbrush it goes easier. The same goes for the time when I wanna put complete head system on my airbrush. Without a drop of reducer it goes quite hard. Now here is my question. Is this normal? Can i destroy I-580-2 if I try to unscrew when head system doesn't wanna unscrew easy? I am also wondering, I-580-2 is in my airbrush not on my head system. How do you replace I-580-2 if there is a need one day?