> For the complete documentation index, see [llms.txt](https://knowledge.illumina.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledge.illumina.com/library-preparation/multiomics-library-prep/library-preparation-multiomics-library-prep-faq-list/000009796.md).

# System waste frequently asked questions for the Illumina Protein Prep Automation System (IPPAS)

**If the trough used to collect the liquid biohazard waste is not emptying fully, causing waste to accumulate and not flow into the 4 L collection container underneath the desk in the cabinet, how to resolve this issue?**

The cap should be installed tightly. If the cap is tight but there is still an issue, try to lightly unscrew the cap of the 4 L bottle to allow waste to flow.

**Is there a proper way to dispose of tips that have fallen outside of the biohazardous waste bin?**

* To reduce tips being dropped outside of the bin, it is recommended to use a taller, square bin and to push it to the back right corner as much as possible.
* To install a taller waste bin:
  * Remove the waste chute from the instrument
  * Place the taller bin underneath the waste chute area
  * Replace the waste chute. Note: make sure the waste chute is properly seated upon replacing so the RGA will not crash
* For tips that have been dropped, use gloves and treat the tips as biohazardous. In addition, be aware of the sharp tip points, as there is a risk of glove tearing or skin puncturing.

**How to resolve wafers stacking up in the solid waste container, preventing more wafers from dropping in?**

To resolve, shake the container to settle wafers to allow more to fall in. This may need to be repeated multiple times as more wafers accumulate.

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #9796), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000009796%20-%20Library%20Preparation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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