I have ReSound custom silicon molds. I have lot of wax in my ear canals. It hardly ever enters the receiver opening bores and almost always does not go very deep into the openings if it does. Any wax is easily sucked out with a (consumer) Jodi-Vac. I change my wax guards once a month but they always look clean. I found periodic treatment with a mild acetic acid solution (a prescribed medicine for a previous ear infection) loosens accumulated wax and causes most of it to come out within a day or two of treatment as a glop adhering to my molds (and sometimes clogging receiver openings 'til vacuumed). I will add links to this post or a further reply shortly when I have more time. I used to wear open domes, power domes, tulip domes, etc. but those did get regularly jammed with wax upon inserting perhaps because the flaps can be deformed, allowing the receiver opening to plow along close to the waxy ear canal surface. Since my molds are pretty rigid and the receiver opening bores are positioned at some distance from the circumferential surface in contact with the ear canal, they are very hard to clog, except when loosening wax with (in my case), a prescribed ear medicine.
Here’s a link to the medicine I was prescribed for a previous ear infection. I use it once every couple of weeks now just as a “ear conditioner.” A single bottle on my medical insurance cost $10 and retails for $38. There are probably similar over-the-counter ear treatments. I think it’s the polypropylen glycol base that’s having the wax loosening effect and also probably causes the liquid to adhere more to the ear canal surface and not just run out right away. https://www.akorn.com/prod_detail.php?ndc=50383-889-15
Usually things that require a prescription have the possibility of side effects, etc., so it’s probably not good to overuse anything like this and consult your own physician, etc., before self-medicating, etc.