Wall thickness of .5mm and residue in tank

Hi everyone,

First post here. Over the weekend we tried printing some sleeves and had issues. The first time I tried printing it vertically as that made the most sense. Part of it came out fine, and then it looked like there were multiple melted holes in it. I figured it was an orientation issue, so I let the software orientate it and it came out even worse. Any ideas on what I can do to get it to print this tube/outer sleeve?

My other question is how do we clean the resin tank? I notices a lot of hardened material in it in between print jobs.

Here are pics of the two sleeves.