To see trays in your dream, denotes your wealth will be foolishly wasted, and surprises of unpleasant nature will shock you.
If the trays seem to be filled with valuables, surprises will come in the shape of good fortune.
To see a tray in your dream suggests that you have been spending too much money on unimportant purchases.
If you dream of cleaning a tray, this suggests that you are moving on and planning for the next thing that comes your way.