Washing after the cropper is vital, since this is the first position where the product is almost completely open, including the neck. Washing after the eviscerator creates a water bubble in the crop. The flushing effect of this water bubble, supports the removal of the collected dirt that can leave the crop here after crop removal. The drill of the cropper loosens the skin of the neck, and the water flushes through the neck, opened by the drill.
As much as 80% of the salmonella infections can be found in the crop. All contaminations that normally remain here have a good chance to attach or settle. A thorough cleaning directly after the cropper also immediately cleans the necks as well. Due to the internal turbulence of the air and water mixture, you will see that many loose organs are also removed.
Especially when increasing the line speed, it is vital to have a good cleaning immediately after cropping. Undine removes not only bacteria, but also many loose organs such as lungs as well as crop contents. The Cropper drill comes out at the bottom through the neck, where a rotating brush removes the crops, oesophagus and windpipe from the drill, before the drill goes back up through the same neck and carcass again. If the drill bit is not clean, there is a risk of cross-contamination from the head to the rest of the carcass and to other products.