Ive been running a 102 recently and theres no alcohol in the shop , but it pays to take a few minutes and check the roller settings , maybe even on a daily basis if your in a 3 shift shop , every one likes to touch things at night for some reason but Im telling you I have no scumming problems and keep my water speeds fairly low by taking the time to reset the damps...like tom said pay attention to what your doing , this alcolor system runs fine w/o alcohol....