> For the complete documentation index, see [llms.txt](https://help.sbtinstruments.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sbtinstruments.com/troubleshooting/other-problems/dilution-dispenser-is-stuck.md).

# Dilution dispenser is stuck

The piston of the dilution dispenser does not move.

You cannot push down the piston on your [dilution dispenser](/item-register/accessories/dilution-dispenser.md).

{% hint style="danger" %}
**Do not force the piston.**
{% endhint %}

One or both valves inside the dispenser are most likely stuck. Often it is enough to clean them, so they move freely again.

See the instruction manual that came with the dispenser. Section 10 shows how to remove the valves, and section 13 covers troubleshooting.

Still stuck? [Contact support](/troubleshooting/contact-support.md).


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://help.sbtinstruments.com/troubleshooting/other-problems/dilution-dispenser-is-stuck.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.