This earscope has two advantages: it's made of ozone-resistant Teflon and comes with removable ear buds. This makes it easy to share the earscope with others and/or replace the earbuds. It comes with two. Additional pairs can be purchased. Ear buds twist on easily and securely.
A humidifier is recommended; it humidifies ozone to prevent drying. Insufflating through the ears allows ozone closer access to the brain, obtaining better results. The ear buds are replaceable.
Another option is to use wet gauze over the earbuds before placing into your ears. This option minimizes equipment and keeps the earbuds clean.
