Not sure what your budget is, but I use this ultrasonic for my Mono X prints. I do the following with great results:

• Fill it with nearly boiling water
• Run it with the models
• Pull off the supports
• Put the models in a gallon ziploc with IPA
• Run the bag in the ultrasonic
• Dry and cure
• Cure and dump water
• Cure and strain IPA to reuse

https://www.amazon.com/gp/product/B075FQJ995/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Edit: here are my results before and after using this method. I also changed resin blends and printers, so look at the cracks and places that didn't get cleaned before rather than the amount of detail the model held.

https://imgur.com/a/75iP5ZS