We at LivezoneR41 build Custom In Ear Monitor casts on the ears.

What we need from our customers is a full ear cast, with particular attention to the upper and lower basins, the tragus, and antitragus.
The Otoblock should be made of cotton instead of sponge. The sponge for structuring the elasticity does not detect important details of the second bend of the duct and changes the pressure of the dough in the same. Customers will be required to chew some chewing gum during the duration of this procedure as it is necessary for hardening the dough, and is important for finer details on the articulation joint and its reflection on the conduits during various jaw movements. The hearing prosthodontist will shape the dough with the thumb with firm pressure until the hardening process is almost complete.
It is recommended to use syringes for conventional impressions, and to avoid if possible electromechanical syringes that prevent detecting the correct pressure for the entire volume of the ear. (They are good for the acoustic prosthetics but they are not indicated for In Ear Monitors).