The idea behind oxyclean is that the chemically induced release of O2 from the water creates a turbulent environment whereby particles of soiling are loosened. Baking soda works as a base against acids, neutralizing them and thereby eliminating the taste and odors that they impart. Two very different applications for two very different products. I would just use hot water until you can get more baking soda. Smoke happy.
Al Fakher Large Solid and a bowl of DM . . . life is good!