Yes, the tray on an Ikea high chair can be removed. However, once the tray has been snapped together, it can be difficult to remove without applying some force. Some people have found success using brute force, pulling on the front edges of the tray, or by cutting off the grooved hook. Alternatively, some people have found it helpful to use a hack to make the tray easier to remove. While the tray can be tricky to remove, with a little effort it is possible to take it off and clean it as needed.