Not sure what type of ear plugs you've used. Foam ones don't work, silicone are too hard, so I only use wax. And yet there are wax plugs that are too hard (and remain hard even at high temperatures). I don't like them. Ototap is my favorite brand - half of the plug is made of moderately hard wax and the other half is so soft that it actually almost becomes liquid in your ear, especially at high temperatures. And you can always reshape them in cone form so they fit your ear.