Made with PLA+, OC used PETg so both should work
no supports
You want max adhesion so rafts or your slicer equivalent will help.
Infill shouldn't make much difference, I used 20%
This is a tall model- almost 240mm so make sure your printer can fit it.
For some reason Cura keeps putting the model at the corner of the platform so you may need to move it to center before slicing.
Adding just the bottom in case you want to test the fit before committing.
The author remixed this model.
The tip has a sharper, non uniform angle with a ridge in the middle to prevent getting stuck to flat objects. This helps get maximum suction into tight corners and along flat surfaces- great for removing water/puddles from the floor.