LC/TQ Ultivo Spray Stability Issues

Hello, I would appreciate any help possible with this question. I have an Ultivo LC/TQ and it is having the problem with autotuning. It fails due to spray stability. Due to this I am thinking it might be the nebulizer? I take it out and see good spray; however, I try using the 40x magnifier and the tool that I was given but can't really see anything (just see white background). I also believe, if this is the case that I will need to replace the nebulizer. Does anyone have any thoughts/manuals/videos/steps on how to do this? Thank you!

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