If you dont let it get nasty dirty it comes super clean fast n easy. N just have alota glass so some are always in iso bath and multiple perfect clean at all times. No different than running multiple vapes at all times
I have 8 to 10 pipes 3 or 4 in rotation. Sometimes I lose track and one gets put up dirty or I let one get dirty due to the color changes but a good oxiclean bath and it is back to crystal clear. I used to do the iso bath but sometimes the taste afterwards is not that great.