I prefer scrim to microfibre as one scrim seems to last a whole bungalow and I can use it to clean small windows without a squidgy. Questions- Is it ok to wash it at 50 degrees, cos I heard it should really be put into a hot wash! I put it at 80 degrees with some orange football bibs and the orange ran into the scrims and cloths. is 50 degrees enough to improve the quality of the scrim? I heard hot washes is good for them. Lead poisoning! I heard you can get lead poisoning from using a scrim on small lead windows, is this true? Sometimes I sniff the scrim lol or put to my face to see if it's dry, could i be sniffing lead lol? I keep getting that black gunk from that comes off from the window frames on my scrims, and can't totally wash it out.