Cleaning Process Guidelines


RealWear devices are industrial strength assisted reality devices designed for rugged use in hazardous environments.  The HMT-1 and HMT-1Z1 certified meet IP66 standards for water and dust ingress. All discussion henceforth concern the cleaning of HMT-1 and HMT-1Z1 devices and their ability to withstand common cleaning processes.


Before You Begin

  • HMT enclosures have been tested against soaking with 96% ethanol.
  • HMT enclosures are able to withstand submersion in ethanol for 5 minutes.
  • IMPORTANT: This test was for housing integrity only and was not performed on
    working devices.
Procedure  Alcohol Test – Housing Integrity 
Date  March 2, 2017 
Device  HMT-1, HMT-1Z1 
Location  RealWear Test Labs, China 
Procedure  Use 96% ethanol and submerge the non-functioning samples for 5  minutes and leave the samples in room for 1 hour., Then perform  2m x 6 faces drops. 
Conditions  Ambient temperature:25+/-10℃  Relative humidity: 55+/-20% RH 
Status  PASSED 

Cleaning the HMT-1 and HMT-1Z1

Combining the IP66 certification and the ability of the housing to withstand 96% Ethanol, RealWear guidance is:

  • HMT-1 and HMT-1Z1 devices may be wiped or sprayed with up to 96% alcohol.
  • Comfort parts can cleaned by subjected to epoxy ethane vapor, or replaced with RealWear’s Flexbands. Flexbands are RealWear’s silicone ‘clean-room’ straps. Flexbands can be wiped with alcohol.

Follow these instructions for cleaning the different areas of the HMT-1 or HMT-1Z1:

  • Exposure: Ensure that all covers are firmly secured when cleaning.  The HMT should never be submerged. The HMT is water resistant so cleaning with a damp cloth and mild soap is appropriate.
  • Alcohol Wipes: You may also use isopropyl alcohol wipes to clean and lightly sterilize the hard surfaces of the HMT. Dry surfaces or simply allow to air dry.
  • Display and Camera Glass: Use a standard micro-fiber cloth to wipe off glass parts. You can use screen cleaner to enable the sharpest possible images.
  • Fabric Parts: Under normal use the Overhead Strap and Rear Head Pad are expected to eventually wear down and need replacement.  Replacement straps and pads can be purchased at  They may be cleaned with alcohol wipes, but excessive cleaning may accelerate wear.
  • Battery:  Should the battery become dirty, clean with a dry cloth alone or in combination with alcohol.  If dirty, they may be cleaned with cloth, cotton swaps, toothbrush, and alcohol if needed.  The contacts should not corrode.  If the battery appears as all damaged, replace the battery immediately.
  • Warranty:  The battery must always be kept dry.  An indicator on the battery housing will turn red if exposed to excessive moisture.  If the indicator is red, the warranty is voided and the battery should be immediately disposed of properly.

Cleaning HMT Accessories

  • Hardhat Clips: Hardhat mounting clips are made of plastic and can be cleaned with alcohol wipes or water. Tip: Toothpicks can be used to remove dirt in hard-to-reach areas.
  • Tri-band Strap: The Tri-band Strap is comprised of plastic and fabric. It can be cleaned with alcohol wipes, but excess cleaning may accelerate wear. Replacement straps can be purchased at
  • Hearing Protection Ear Buds: The RealWear Hearing Protection Ear Buds are an electronic component with a metal connector, and cleaning of the buds themselves is not recommended. A polish with a dry or lightly damp cloth should be sufficient.  Too much moisture could cause damage to the speakers.
  • Foam Tips for Hearing Protection Ear Buds: The foam tips for the ear buds are comprised of memory foam. You may clean with a dry cloth. Too much moisture could damage the foam.  The Foam Tips are considered consumables and are expected to eventually require replacing.  Replacement parts can be purchased in the RealWear Store.

RealWear supports the following sterilization methods for HMT-1 and HMT-1Z1:

  • “Cleanbox” UVC light sterilization
  • Cleaning procedure with sodium hypochlorite either “Dispatch” 0.65% solution or “Klericide” 0.5% solution, with a 5 – 7 minute contact time followed by 70% isopropyl alcohol wipe-down. A maximum of 2-year warranty only can be offered if used under this cleaning protocol.
  • 96% ethanol solution with 5-minute contact time.

Note:  RealWear’s assessment is that IEC 60601-1 is not applicable for the use cases for an HMT-1 and 93/42/EEC is not applicable in most circumstances, however that determination must be made by the medical customer.  RealWear assumes no liability for use of the device if it were to fall under these standards.   RealWear has not tested HMT-1 to either standard.


Quick Reference

Method  RealWear Guidance 

Wiped or sprayed with up to 96% alcohol. 

Comfort parts can by subjected to epoxy ethane vapor, or replaced with RealWear’s Flexbands.  Flexbands can be wiped with alcohol. 






Epoxy ethane 



Hydrogen peroxide 



Gamma Radiation 



E-Beam Radiation 






Cleanbox is a premium, eco-friendly, smart-tech hygiene solution for the decontamination of AR, MR, VR and Communication headsets, eyewear, masks and other industrial hardware.

  • Cleanbox eliminates the need for heat or toxins in the decontamination process, protecting electronics, the user and the environment.
  • Cleanbox is independently lab tested to kill 99.99% of bacteria, virus and fungi in 60 seconds.
  • Realwear has tested this device and has approved it for use with HMT-1 and HMT-1Z1.

For more information, visit the Cleanbox website.