Make it evening when you are refining your item.. Go to the market, buy refines and go to the very corner of the market.. You should only refine item with +4 on a single day.. On the other day, make it just +5, exceeding refines will be complicated..On the the other day again make it +6 (same time evening) and the other day make it +7..So it means 1 day = 1 refine (for making +5 and so on)..The question is, how to do the refining?? Here's my style:

Drop your weapons or items and also drop the refine..(Be alert for looters) After you drop them, press space bar rapidly to pick them up.. After picking them up, dont waste time, rapidly put your refine to the item then BOOM!! it works!!

PS: Im just sharing my experience, if ever you failed, dont blame me.. Boy_Bawang17 here at your service.. goodluck ^_^ oye