I stamp a lot and my acrylic blocks are always a mess. I've never really been able to get my acrylic blocks pristine again without a lot of scrubbing so I wanted to show you what the Best Cleaner Ever could do.
I spritzed the Best Cleaner Ever on several acrylic blocks and allowed them to soak for a minute or two. With very little pressure, I was able to remove all the ink residue. For stubborn residue, re-spritz the block and allow it to soak for several more minutes.
Once clean, I rinsed the blocks under warm water and dried them with a cloth. The blocks look amazing.
Hope you give this a try.