do i still need to send in rolex for service if not worn?

[abt43392]

I bought 2 brand new rolexes back in 2011:

submariner
gmt master ii

I wore the Sub daily for one year. Then bought GMT, but never wore it.

Then i never wore them again, been sitting in their original boxes for the last 8 years. Because i changed job, so didn't want wear rolex to work.

do i still need to send them in for regular maintenance?