A strategy you can use if you don't have or don't want to use pruners is just to reach with your fingers and snap off the remaining center of the bloom. This is called "deadheading" and it's a regular task when growing roses, assuming they bloom of course
I enjoy deadheading since it gets me up close and personal with the roses, and reminds me that they have indeed been blooming. Otherwise, your roses look healthy.
Cynthia