Equipment Sticky step

[Daffie]

I bought new equipment to have an exercise space at my mom's. I ordered new step from Amazon. It had bubbles in the black topper and made popping noises. Not fun like bubble wrap. I sent it back and got another one. It also had bubbles but smoothed out. But, the step still sounds sticky, like someone smacking their lips when they eat. The sticky isn't on top where I can wipe it off. I emailed the company and the reply was to poke holes in it. Since the bubbles are gone I don't know what he means. Would you send it back? I think I have had 3 other steps over the years without any problems.