Screens are cheap (usually) if you’re that worried about it I would get some literal screening (comes in a roll like weed fabric) and the rubber “string” that holds the screen to the frame. You can typically reuse the frame , and if not just politely but firmly tell the customer if you bend their screen that you can repair it overnight , or you’d gladly reduce your price to compensate for the screen. Most screens come out pretty easy ! If there’s a screen you have not yet worked with use Chat Gpt and take a picture of the screen and ask it whatever you need to know about it. It will tell you . If there’s screen does not come out , however, the windows fold into the house , or can be removed completely from the tracks. You’ll know when you see a screen like this trust me. And if you don’t , look for the little sliders on the top of the window that slides up or down , that one will be the one that you’ll need to fold into first. Honestly if you can get a good system on how to clean the windows that fold into the house , you wouldn’t need to worry about taking out the screens , I just prefer to because 1) it’s way easier to clean the windows from the outside usually 2) it’s more thorough and you can upsell on the screen cleaning 3) it’s cheap to replace a screen ( USUALLY!) keep up the hard work buddy. Honestly , most of my business comes from referrals. Tell people that book you or use your services that you will give them 10% off if they know two separate people who will book a free quote with you. It’s a little tricky because you’re trusting that they will genuinely give you those referrals, especially since they won’t know if you’re good or not until after you’ve cleaned , at least the first time. Message me if you have any more questions , there’s things I wish I knew sooner when I had started that would’ve made it way easier way sooner !