[Tigers] refurb idiot lights

[rande]

A while back, someone wrote that you could gingerly pry off the chrome retainer,
flip the lens back to front, and it produced a fresh lens surface. The trick
is to be very careful with the chrome retainer, it doesn't take much to damage
it. The tech tip was directly aimed at fading generator/alternator lamps. I
tried this, and it worked for me.

If you don't have a spare lens, and you need a sacrificial part,or you want
to shop for new, eBay usually have used ones listed every other week, and occasionally
has listings for new ones.