I have a very similar setup, I use 99% rubbing alcohol and Epsom salt as well. I’m a clean freak with my glassware so I do it every day, but it only takes a couple minutes. I boil some water, run that through all the percolators, then pour in a bit of alcohol with Epsom salt and do the same before hitting it with hot water one last time. Just slap some silicone bong caps on both sides and give it a few healthy shakes, the tar and shit comes right out.
I have a very similar setup, I use 99% rubbing alcohol and Epsom salt as well. I’m a clean freak with my glassware so I do it every day, but it only takes a couple minutes. I boil some water, run that through all the percolators, then pour in a bit of alcohol with Epsom salt and do the same before hitting it with hot water one last time. Just slap some silicone bong caps on both sides and give it a few healthy shakes, the tar and shit comes right out.