Do not pour boiling water over them, particularly on japanned ones,
as it will make the varnish crack and peel off; but have a sponge
wetted with warm water and a little soap, if the tray be very dirty,
then rub it with a cloth; if it looks smeary, dust on a little flour,
then rub it with a dry cloth. If the paper tray gets marked, take
a piece of woollen cloth, with a little sweet oil, and rub it over
the marks; if any thing will take them out this will. Let the urn be
emptied, and the top wiped dry, particularly the outside, for if any
wet be suffered to dry on, it will leave a mark.