Question about tight joints

I finally received my tonsenarttoys trunks, and as you all know, his joints are very tight. I’ve never oiled figure joints before, so I was wondering how you guys do it? I really don’t want to mess up this figure, so any help would be appreciated.

I finally received my tonsenarttoys trunks, and as you all know, his joints are very tight. I’ve never oiled figure joints before, so I was wondering how you guys do it? I really don’t want to mess up this figure, so any help would be appreciated.