Using your ATTENU8 ear plugs is easy. First, choose the right size of memory foam tip for your ear. If you're a side - sleeper, attach the bottom foam tip. Roll the foam tip between your fingers to compress it, then insert it gently into your ear canal. Let the foam expand and create a seal to block out noise. When not in use, keep them in a clean and dry place. The foam tips last about 6 - 8 weeks, so replace them regularly for the best performance. Avoid getting the ear plugs wet, as this can damage the aluminium body. If they get dirty, you can gently wipe the body with a dry cloth.