I always put a little wd 40 every once and a while.. Get stainless plugs and female connectors they last longer and are alot smoother in hookin up.. I only use the 3/8 orings on the hose ... I dont quick disconnect nozzles those 1/4 inch o rings dont hold up to hot water...I just have a bunch of guns and wands .. right now I have 6 -st2000's 12 inch wand on one , 24 inch wand on one, 36 inch wand on one , 48 inch wand on one , soap nozzle on 36 inch wand on another, bent wand on one for hood cleaning grease troufs,on the end of my hose I have a 3/8 Sutner High Pressure Valve ...This way no need for 1/4inch o rings... plus it looks good with all the wands lined up on the back of my trailer ( ON THE BIG JOBS ) lol