The 'o' rings that come on the steam wand at purchase are rubbish. They come off easily without you even noticing when you remove the parts for cleaning after each frothing. The replacement o rings from DeLonghi do the same thing. I eventually went to my local coffee machine repair shop and got an o ring from them. It has never come off in the year and a half since. . . . . and I have no problems with my Magnification S. Now I LOVE my coffee machine!!!!!!