In this case, it is an adhesive with a large quantity of filling agent and technology operating at 220 °C. We cannot violate the laws of physics, and degradation and burning of the adhesive is inevitable in this situation. However, the layer of adhesive in the picture reached a thickness of up to one centimetre, which resulted in the outage of the entire unit. It should be noted that it would be sufficient to clean the machine thoroughly once a year. It is necessary to observe the maintenance intervals, especially with such specific solutions where the necessity of maintenance can already be expected in advance. You are saving your own costs.