Nah it has not spread or gotten worse. Ca spotting as in calcium? You thinking Ca got locked into hard toxic deposits that destroyed cell walls of the vien?
Yeah I think it's a small group of mites, why? Because I look today at my plant and it has a few webbing that goes from one leaf to the other and small ones that goes from one serrated edge to other, though the dots are not spreading. Also I spotted one sticky wet looking spot on a leaf that I could not rub off. If I do try the mixture of dawn soap and water, will the diluted soap water in anyway harm or kill my plant?