Absolutly keep the hinge pins, and surface parts and those areas you can get to wiped clean and oiled or greased whichever the case may be...I use a very small amount of grease on the hinge pins, but clean them dry and use a very small amount of that red transmission oil on them when I hunt....That is the worlds purest oil BTW...

The problem with oil or grease is that it collect dirt, grit and stuff that is abrasive and damaging., so a little really goes a long ways in the field.