You might try adding a little Sea Foam to the crankcase 100 miles or so before your next oil change -- 1 oz. or so to each quart. The stuff does work, and will loosen and flush out a significant amount of crud when you drain out the old oil. May not clear up that sight class enough, but it's cheap and worth a try.
One accessory that has helped me tremendously in checking the oil level is a mechanic's telescoping mirror. I can sit on the bike, level it up, extend the handle of the mirror, and look at the oil level -- all without the help of an assistant to hold the bike level, or of dropping the bike while I'm trying to hold it level and practically standing on my head to read the oil level.
