Thanks for the suggestions, mpirringer! I do indeed have an E3D V6 hotend. A while back I did come in to find a massive blob of plastic covering the entire hotend up to the heat break (I work in a makerspace) which required a new thermistor after the original was lost to the plastic blob. I'll have my techs follow your suggestions and I will report back here.

For several weeks my Pulse XE has been printing with sub-par results. Prior to this I considered it my highest resolution printer, capable of producing really nice detail and high quality prints. But something has changed and I am not sure what caused the change. Prints now have, for lack of a better description, "gaps" in them. See images below:

https://drive.google.com/file/d/1r362mTMgYpYEh_4FPV42YLMLUFcmZ26Y/view?usp=sharing
https://drive.google.com/file/d/1r7azRjVTZ_1uxweKlXcWSsm6kSmhb18u/view?usp=sharing

Both prints in these example images were done with Hatchbox PLA. The printer typically is used exclusively with Hatchbox PLA. Several months ago someone did use wood filament with the printer so perhaps some residue is remaining in the hotend or nozzle that is causing clogs? Although to me it seems like if that were the cause of the issue the imperfections would be more random. But it seems like there is some consistency between the same print in the different colors of filament shown in these images.

I have tried uninstalling the MatterControl software and reinstalling, using the stock MatterControl profile for PLA but that has not resolved my issue. Perhaps this is a common issue and there is a solution out there I am missing. If that is the case I apologize but I have not figured out the right terms to search for this. Does anyone have any suggestions? Thanks!