# Cleaning the Smart Dispenser O-Ring #### When to Clean the O-Ring Clean your smart dispenser O-Ring every time you notice material build up around the O-Ring when disassembling the smart dispenser. This should be done on an as needed basis, but it is worth inspecting after each use. Usually there will be other signs like a ruptured cartridge to let you know this needs to be done. #### Steps for Cleaning the O-Ring **Step 1:** Wear appropriate PPE. Refer to the SDS of your material. Typically, this means gloves and goggles, and sometimes requires handling in a fume hood. **Step 2:** Remove the O-Ring by rolling it up and over the groove. Then gently wipe down the O-Ring with isopropyl alcohol and a low-lint wipe. This is also a good time to inspect the O-Ring for any damage or swelling.

### Replacing the O-Ring #### When to Replace the O-Ring During your cleaning inspection if you notice any damage to the O-Ring or if it has swelled, you will need to replace it. Usually there will be other signs like a ruptured cartridge or odd printing behaviors to let you know something is wrong. #### Steps for Replacing the O-Ring **Step 1:** Wear appropriate PPE. Refer to the SDS of your material. Typically, this means gloves and goggles, and sometimes requires handling in a fume hood. **Step 2:** Remove the O-Ring by rolling it up and over the groove. Then place the new O-Ring into the groove on one side and roll it down into place.