How do I clean the burnt fabric etc collected on my electric iron?

Put some salt on a piece of foil big enough to lay your iron on ...turn your iron using the steam some,iron over the salt,this is a trick my grandmother taught me it works you may need to add more salt time to time

www.hometalk.com/diy/clean/appliances/diy-iron-cleaner-clean-your-burnt-iron-1217260

Using a new S-O-S scrub pad and an iron set on High heat, iron the pad until the iron comes clean.

Try ironing an unused dryer sheet.

if your iron is metal and not Teflon, clean with a sos pad while iron is off. rinse it and dry well. Turn on the iron and iron a pice of scrap cloth just in case there is residue on the iron. This works great