First of all, Venzke, welcome to the NAFC Forums. If you've just joined the NAFC, welcome to the Club as well. Glad to have you here.
As a general rule, the slower your presentation, the larger a part scent plays in it. I don't really use scents for spinnerbaits, buzzbaits or other quick swimming lures. The hits on those are, more-or-less, "reaction" strikes. But for pitching & flipping, Carolina rigging, or other slow methods, I'll use either a spray-on scent, pre-scented soft plastics (Gulp!, PowerBait, etc.) or some type of live bait (minnow, grub, nightcrawler piece, yada-yada-yada) to give the presentation some smell to it.
You can't get the spray-on scent off of soft plastic lures unless you soak the things a reeeeeeally long time. It will dissipate from hard lures in short order, though. In fact, you might have to repeatedly spray the balsa & hard plastic baits as you use them.
If I'm not fishing, I'm thinking about it.
Keep the line fresh, the hooks sharp, and have fun fishing. God bless you. -Sonny, Life Member since 2002