Hi Anne!
My Arctic jets were also replaced a few months ago now - I didn't get the stainless steel upgrade, rather the regular black-style jet. Unfortunately, I'm starting to have some problems with the replacements as well. Several will not stay on (turn themselves off), while a few others continue to pop out alltogether. I haven't notified the dealer yet about this recent development but it seems I'm going to have to when I can find the time. My dealer has always been receptive and helpful with all my jet problems, however I'm starting to grow a little impatient with having to go through the process at again and again.
I hope to ask you again in the future how the new jets are maintaining themselves - hopefully very well!
Jc