No, "regulated" means subject to regulation. A recognized fighting force must have rules.
A regulated clock is subject to a time-keeping standard. It has nothing to do with whether it is cleaned.
No, at the time of the 2nd Amendment was penned, “regulated” meant something different than how regulated is used today. Very common misconception. “In excellent operating order” or “well trained”.
This is an important distinction, because of unscrupulous types who want to pervert our laws.