Mine came with sw4. It is about $95 for a 5 gallon jug delivered from oreilly auto parts. I turn mine off when I'm not using it as well to slow down evaporation. It only takes a couple of hours to warm back up so I turn it on 1st thing in the morning when I know I'll need it that day. I use 2 five gallon jugs a year. I remove 1 layer of the filter each month. I have the large unit. One thing you'll like is that it smells much milder then mineral spirits and I'm sure it has to be better on your squeegee material.
