u/Great-Turn4201

A month or two ago I had a clogging situation I cleaned out what I thought was all of it but I saw someone on the previous forum told me to check the back of it and that there should be more, I don’t think much of it, I was doing a maintenance clean and low and behold I see pla inside the hotend heating block.

How do I go about cleaning this? Do I open more screws? Is there a guide?