John,
LMB Extreme, approved for use DURING bowling, will remove the ground in oil flare lines that neither 91% isopropyl nor SG would remove. In fact, no other cleaner approved for use during bowling that I have, to date, tested, will remove those ground in oil lines except LMB.
As far as I can tell, almost any cleaner used with a microfiber towel will remove almost any kind of bowling dirt except those ground in oil lines. Only the strong cleaners, LMB, Clean n Dull and Hook-it will remove those oil lines. Only LMB is approved for use during bowling.