I share your concerns and am eagerly awaiting new legislation that would eliminate the term "biodegradable" on all wet wipe packaging. It should be clearly indicated that the wipes are to be disposed of in the trash.
In the meantime, below is an example of the kind of letters we send out on a regular basis:
Dear Sir or Madam,
In response to your letter regarding a broken building trap in the property located at [insert address], which you asked us to replace, we are writing to inform you that a technician has completed an on-site inspection and determined that the main drain trap is functioning normally, as is the municipal connection, which was confirmed via CCTV.
During the inspection, however, the technician noticed the presence of a significant amount of wipes in the trap. According to Article X of the municipal wastewater regulations, wipes cannot be flushed down the toilet because this results in the type of blockage that your building is currently experiencing.
Moreover, in accordance with Article X, please be aware that any "disruption due to negligence, carelessness or recklessness by a user or a third party, which affects the wastewater's operations, can result in the person responsible assuming the costs incurred for any related damage or repair.”
It is therefore, crucial that these products be eliminated via the trash and not the toilet, and we ask that you ensure all residents of the building are duly informed.
This is a straightforward communication issue.
All you need to do is remind your customers of local regulations, emphasizing that no solid waste of any kind is permissible and that only domestic wastewater should be flushed through the system.
In general, biodegradable wipes decompose quickly, so the ones causing the problem in your utility must not be. Avoid any trap with a partition and opt for direct connection instead.
Wipes are the scourge of WWTPs for the number of screws alone that get broken because of the clogging.
I invite communities to display photos of what accumulates on screens to educate all users.