Well the reson i'm asking this is as follows i'm on my 6 home brew but the first one i used glucose and it was so nice then i read every one going on about using spray malt so i started using that but i tastes like S?it all 5 of my brew have a iron aftertaste. i changed the water source thinking that was it, using same cleaning technics as the first brew,i'm very clean when i comes to brewing.has anyone had the same problem as me