

Normal corrosion?
Hello!
I've just done a tear down of my Gaggia Classic 2012 machine, intending to give the solenoid a once over. But I am shocked at the amount of black and beige flakes and dark patch inside the boiler. Is this just normal aluminium boiler corrosion and just needs a good clean or is something else going on here?
I live in a soft water area (Scotland) but I got the machine from family who may have been using it in an area of harder water.
Thank you!