The recommended speed for removing hard wax is fast. This is because pulling the wax off quickly and in one swift motion helps to minimize discomfort and pain. Slow removal, on the other hand, can cause the wax to harden and stick to the skin, making it more difficult to remove and causing more pain. It's important to remember to hold the skin taut with one hand while quickly removing the wax with the other hand to ensure a clean and effective removal.