HakunaMatada- If you’re asking them mechila even if it’s something that you don’t remember, how is that any different than something you do remember?
I have a friend who doesn’t believe in asking people mechila because everyone says tefila zaka, and in tefila zaka you say you’re mochel everybody. However, i heard b’shem the Chofetz Chaim that you shouldn’t rely on that because not everyone has time to say it (which is why in machzorim they have that paragraph inserted earlier).