I do not like to use the trays in food centres ("S'pore diners still fare poorly in returning trays"; May 9). Diners at these places have the revolting habit of spitting bones and other food waste on tables and trays.

Cleaners then clean the tables with the same cloth they use to clean the trays.

This is very unhygienic and is a health hazard, as infectious diseases can be spread from unclean trays.

I hope the National Environment Agency will pay closer attention to the cleanliness of trays.

I do return used crockery to the tray-return station, though, minus the tray.

Linda Lo Chee Yong (Madam)