it won't crank until I let go of the key or sometimes it is slightly hesitant but it always starts?

So, I take excellent care of my vehicle even though it's high mileage it literally drives new. I have recently replaced battery starter alternator starter relay switch and a few other things to prepare the vehicle for the next couple of years as. I used it to earn an income, I think I need to change the ignition switch what I noticed is upon the very first cold start it cranks with no problem it continues to crank with no problem throughout the day, but what I will notice is sometimes it won't crank until I let go of the key or sometimes it is slightly hesitant but it always starts. This usually happens around the 6th, 7th, 8th start but then throughout the day it can go back to starting just fine which leads me to believe it is a worn ignition switch that is starting to manifest. what are your thoughts??