If its slimy I would assume you have a bacteria growth. What are you using for soil and lighting. What's your humidity? My current 6 Jock Horror Autos, coco coir grow.
Best off using your thumb nail (clean!!!) to cut (pinch). If you don't believe us, you will invite pests and PM into your garden!
I am also a believer in a layer of sand or gnat nix, or perlite over the top of your soil to help in prevention too.