Fame
If you plan on getting famous in this career, you'd better get creative. Generally speaking, janitors don't do the kinds of glamorous work that attracts the attention of the world at large. It's not impossible to gain fame as a janitor, but it will likely require talent outside of the custodial field.
Maybe the video of you breakdancing on those lemony fresh floors will go viral. Or perhaps you could rescue a future pop star from getting a swirly. And, of course, you can always take some acting classes in your spare time.