> For the complete documentation index, see [llms.txt](https://docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verifone.com/hardware-products/hardware/engage-devices/mx900-series/mx-900-series-installation-guide/maintenance.md).

# Maintenance

The MX 900 Series terminal has no user-maintainable parts. The smart card implementation is a proprietary hardware solution that has no serviceable parts.

## Cleaning the Terminal

To clean the terminal, use a clean cloth slightly dampened with water and a drop or two of mild soap. For stubborn stains, use alcohol or an alcohol-based cleaner.

{% hint style="info" %}
Never use thinner, trichloroethylene, or ketone-based solvents as they may deteriorate plastic or rubber parts. Do not spray cleaners or other solutions directly onto the display.
{% endhint %}

## Cleaning the Display Screen

The following is the display screen cleaning method:

{% hint style="info" %}
Do NOT spray cleaners or other solutions directly onto the display.
{% endhint %}

1. Use neutral non-scrubbing detergent or isopropyl alcohol on a clean soft cloth to clean the screen surface.
2. Prevent using any kind of chemical solvent, acidic or alkali solution.
3. Apply the Touch Panel cleaning solution to the cloth first then wipe the surface of the touch panel.

## Magnetic Stripe Cleaner

The following is the MSR cleaning method:

Dirt can lead to magnetic stripe card reading problems. The magnetic stripe reader (MSR) should be cleaned on a regular basis (daily to once a week depending on usage) using commercially available card reader cleaning cards or Verifone part number 02746-02.

{% hint style="info" %}
If using a commercially available cleaning card use ONLY an approved MSR cleaning card made specifically for POS MSR Card reader terminals or Petroleum MSR card readers.
{% endhint %}

## Smart Card Reader

Do not attempt to clean the smart card reader. Doing so may void the warranty. For smart card reader service, contact your Verifone distributor or service provider.


---

# 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 dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.verifone.com/hardware-products/hardware/engage-devices/mx900-series/mx-900-series-installation-guide/maintenance.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.