PETG needs some time to cool. With something that small, you'll need to slow down and have the fan running full time. It may help to arrange several of them on the print plate, since printing multiples will give some extra layer cooling time for each one.
You also want to make sure your PETG is dry. It absorbs moisture like crazy, and it is often damp when received despite being sealed with a little Dessicant pack. When damp, it prints horribly. The moisture vaporizes in molten filament, causing oozing, stringing, bubbling, and a rough appearance. Hard to tell from your photo, but it looks like that might be at least part of the issue.
To see if that's part of your problem... Take several feet of filament off the reel and dry it 60-65C for a couple hours, then try to print a couple of those clips. You may be able to dry it in a household oven, but most ovens will overshoot that temp and may deform/melt the PETG. A food dehydrator is the best solution to maintain that temp and provide lots of air flow.
I dry every spool of PETG when I receive it and store it in a sealed container with Dessicant packs. For printing, I have a converted food dehydrator that holds the spool and feeds directly to the printer. Dry PETG is wonderful to print, but damp PETG is a monster!