I have a 1:250 solution and a 1:500 solution. Technically, you can spray the 1:250 on anything and just let it dry, but I prefer to do that with the 1:500. For the 1:250 I treat it more like bleach. I'll spray it on, let it sit for about 10 minutes, and then I rinse it with water (all of this after doing a preliminary rinse and scrub with water).
If you have a 1 L spray bottle , fill the little reservoir to the bottom line , and pour the contents into the 1 L bottle , add tap water and shake well , it's now ready to use .
Only need spray a thin film onto the surfaces of the things you want sterilized .... then wait 20 mins , and wipe dry with paper towel , or simply let the sterilized F10ed thing airdry , and you're done.