What is the opinion of Reddit about the
Aroma Housewares 1.7 Liter (7-Cup) Cordless Electric Water Kettle, Stainless Steel?

The problem kettle is this exact model: http://www.amazon.com/gp/product/B00K0HNHK8?psc=1&redirect=true&ref_=oh_aui_detailpage_o06_s00

It’s electric and stainless steel.

What I will probably do later today is boil some of the deer park and see whether any of the powder/smudges appear on the surface. I have a hunch that it might be the strainer that is causing these issues so I’d try this to see.