to the iris forum elena. i think poly/marilyn gave you pretty sound advice. if you cut them back now, they won't be able to use the much needed nutrients the leaves manufacture for plant and bloom production.
i always disinfect between cuts. i carry a 10% bleach/90% water solution, in a container with me to dunk the tool used between cuts, so as to minimize cross-contamination of bacterial/viral infections.
hope this helps? and good luck with your irises.
i hope you'll post photos of your future blooms?