Clean the stairs using a vacuum cleaner with a hose attachment to remove all dirt and dust.
Verify that no person or pet is on the upper floor because the stairs cannot be used for a while.
Apply one coat of anti-slip, clear-coat paint on each step with a paintbrush. Begin painting at the top step and work your way down the stairs. Pay special attention to the top surface of the steps, although you may apply the paint to the steps' edges and the wood between steps.
Wait for the paint to dry complete before using the stairs.
Clean the stairs using a vacuum cleaner with a hose attachment. Remove all dirt and dust.
Move to the bottom of the stairs.
Center one tread cover flat on the bottom step. Use your hand to smooth the tread cover on the step. Repeat the procedure to apply a tread cover on the top of each step. Work your way up the steps while ensuring that each step's tread cover lines up with the other tread covers.
Remove all dirt and dust from the stairs by using a vacuum cleaner with a hose attachment.
Measure the length and width of each stair step. Use the measurements to cut a strip of peel-and-stick stair grip tape for each step. The tape does not need to cover the entire step, and should not hang over a step's edge.
Move to the bottom of the stairs. Peel the backing off the peel-and-stick stair grip tape strip that you cut for the bottom step, center that tape strip on the bottom step and apply it to the step. Use your hands to smooth the strip on the step. Work your way up the steps to apply each step's tape strip in the same manner. Ensure that each step's tape strip lines up with the other tape strips.