a short video on how i use the ultrasonic however i do not recommend these for the average person, please understand that this procedure could ruin your printhead if you do not know what you are doing.
Per request here is the ultrasonic i used but there might be better ones - amzn.to/446vvNa
Also here is the cleaner however this cleaner is for circuit board cleaning not for ink cleaning and its not cheap also it needs to be diluted with distilled water only and needs to be washed down with distilled water only to avoid corrosion you definably could use other cleaners that are more cost friendly I have this from working on Motherboards- amzn.to/3PlEExv