Hi! I've never tried water propagating pink polka dots, but I have propagated a few times via soil. If you're willing to use rooting hormone, I recommend picking some up. I've been propagating stems from mine with Rootone with pretty much complete success, though I do have to say I've been propagating with significantly fewer leaves. I noticed my propagations tended to faint a little at first, but recovered after a few days. If I left large leaves on the stem, however, the fainting pretty much continued until I trimmed off all but the top four to five leaves. After that, it seemed pretty autonomous; all I had to do was water regularly. Either way, I wish you luck!