Who's responsible for selling maintenance in the shop?

I've experienced a HUGE (as in, roughly $20k YTD over last year same period) drop in customer pay repair order parts sales, and it's almost ENTIRELY maintenance items. I sold fluid replacements, spark plugs, filters, etc, A LOT until the beggining of last year. We've had a bunch of turnover in the service lane, and try as I might to get the powers-that-be convinced, they're seemingly of the same mind that the fault lies with our techs not suggesting services. Same techs, mind you, different people up front.
I've been at this for 25 years, and I've yet to see a technician who's selling services. As I did when I was a SW, I see it as part of the job description. If you're a Service Advisor, you need to be up to speed on what the recommended services are on the vehicles coming through the door, check to see what's been done, and suggest to the customer the needed services.
Where does the technician enter into this, assuming the job's been done right up front? I mean, sure, if the tech notices the transmission fluid is burnt, or they're replacing a caliper and the fluid looks contaminated, etc, they should be recommending more than just slapping on a new part and patting it on the butt, but doesn't the responsibility of selling services lie with, oh I don't know, the Service Advisor?!?
Rant over. For the moment.
Am I in left field on this? How do YOUR shops sell needed maintenance/service items? Rely on the techs to point them out, or is it the responsibility of the guys and gals on the drive?
Thoughts, folks?
I've been at this for 25 years, and I've yet to see a technician who's selling services. As I did when I was a SW, I see it as part of the job description. If you're a Service Advisor, you need to be up to speed on what the recommended services are on the vehicles coming through the door, check to see what's been done, and suggest to the customer the needed services.
Where does the technician enter into this, assuming the job's been done right up front? I mean, sure, if the tech notices the transmission fluid is burnt, or they're replacing a caliper and the fluid looks contaminated, etc, they should be recommending more than just slapping on a new part and patting it on the butt, but doesn't the responsibility of selling services lie with, oh I don't know, the Service Advisor?!?
Rant over. For the moment.
Am I in left field on this? How do YOUR shops sell needed maintenance/service items? Rely on the techs to point them out, or is it the responsibility of the guys and gals on the drive?
Thoughts, folks?