inside rearview mirror has gone darl
What the heck is “darl” ??
Check the position of night driving adjustment lever.
If the OP’s mirror is one that darkens (or, “darlens” ) electronically, it is entirely possible that it has stopped functioning after 18 years. In any event, perhaps the OP can clarify if his mirror is a “conventional” one that has a manual adjustment, or if it is an electronic one.
And if it’s an electronic one, it can be manually turned off with a button, usually on the underside of the mirror.
Get a new one. Even if it is self darkening type junk yards near me sell them for about $30. Problem solved, you are welcome.