Oto-Ease makes wearing H2O Custom earplugs easier and more comfortable. The lubricanthelps you insert custom earplugs easier.
Oto-Ease is a sterile, unscented lubricant designed specifically for custom earpieces. The unique formula provides a non-greasy, water-soluble solution while also helping create an effective acoustic seal.
Here is a video to see how the Custom Earplugs should be inserted: Video
Note: Not recommended for someone with a perforated ear drum or with patent PE tube