Might want to try rubber pipe insulation to separate them where they touch , you can cut in it the length you need, I use it at certain points behind my rack where the ICs and power cords are right next to each other . I put a piece around a portion of the PC where I need it . Comes in different sizes but the link below shows the insulation. You can get it at most hardware stores. Aside from that I use wood cable elevators to keep cables off the floor
https://www.homedepot.com/p/K-Flex-3-4-in-x-6-ft-Rubber-Self-Seal-Pipe-Wrap-Insulation-6RTL048078-HD...
https://www.homedepot.com/p/K-Flex-3-4-in-x-6-ft-Rubber-Self-Seal-Pipe-Wrap-Insulation-6RTL048078-HD...