There are lots of things you can use as an alternative to the "off the shelf" hobby shop products.
Starting under the kitchen sink, thee's plain old dishwashing liquid just a little in some warm water will do the job. Next up, Windex. Rinse well after using either of these.
Moving up a little, you can use denatured alcohol or isopropyl alcohol, just a quick wipe down with a clean cloth moistened with either type and the job's done. Note that alcohols may affect filler/primer products like Mr Surfacer and Tamiya Liquid Surface Primer.