How do you fix a jammed highchair buckle?

To fix a jammed highchair buckle, first ensure the highchair is clean and free from debris that may be causing the jam. Press the release button firmly while gently pulling on the straps to see if it will disengage. If it remains stuck, check for any visible obstructions or damage, and consider applying a small amount of lubricant to the mechanism. If the problem persists, refer to the manufacturer's instructions or contact customer support for further assistance.