This drain clean-out tool is modified from a remix I found made by the user, dmitche. I liked how he resized an original longer 3D print to fit the build plate of printers like the Bambu Labs X1 Carbon and P1P. But like every other version of this tool I found online? He was printing it with TPU so it would be flexible enough to use it.
I wanted to make one that would work with the PETG filament I had on-hand. By cutting its thickness down from 3mm to roughly half that, and changing the parameters for the infill - I wound up with this one that's still flexible with PETG, while not being too flimsy. I successfully cleared the hair out of my bathroom sink drain with it about 20 minutes ago!