DCL not removed on uninstallation of SAP Add-ons

Hi Experts,

We have created an Add-on and while the regular installation and uninstallation activity, I found that certain DCLs were not removed even though the add-on was uninstalled. Do you have any recommendations here that could be of some help? Again, the expectation is when we uninstall an Add-on, all its components including the DCLs should also be removed from the system.

Note: These are custom Add-Ons built by SAP partners in the dedicated namespace for the partner.

Regards,

TK