Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: how do you clean them
Document: Worked great . Just make sure surface is super clean. Very happy with treads. Plus the glow strip is super for low light.
Great sturdy product- easy to install- though I wish i scraped the stair off a bit with a wire brush to make sure the adhesive met with some wood (no problems yet but thought you should know)
Although Super Expensive in my book, but so worth every penny!..Do what it's expected to do. I have it in my basement stairs, that are painted hence slippery. Our dogs are constantly going up and down those stairs and because of these threads there hasn't been any accidents. The reflective stripe is a huge plus. They fir perfect in the steps and the glue is super strong. (Stairs are painted wood)
Answer: yes