Don't try to make a fish strike something that doesn't interest them, you'll lose. If crankbaits and jerk bait do not incite riot, switch to a bucktail spinner. Retrieve the inline lure at various speeds. A little trick which sometimes draws attention is to speed up the retrieve halfway to the boat. The speeding spinner resembles a fleeing fish.
Lure size is another consideration.
Muskies frequently see large lures passing by, and they become accustomed to the sights and sounds. Offer them something unique. Traditional bass lures are an alternative to the usual menu. Smaller lures frequently invoke pressured muskies. Assume that fish living in popular lakes are always in a negative or neutral mood.