@jeffrey: Bravo, jeffrey! Je crois bien que tu sois correct de penser que des moules en acrylique sans pièges à cérumen avertiront de nombreux problèmes, dépendent de la constitution de ton cérumen.
Personally I would opt for wax cups, since (because of my genetic makeup) the cerumen I produce tends to be dry and flaky, and gets into the small orifices of the mould … but that’s just me.
[…but I believe you’re correct in thinking that acrylic moulds without wax traps will avoid quite a few problems, depending on the makeup of your ear wax.]