Within the past few weeks, I finally picked up a record cleaning machine. The general process I've been using for cleaning thus far is Last's Power Cleaner, standard all-purpose record cleaning machine fluid (a bottle came with the machine; after that is gone I have a half-gallon bottle of Nitty Gritty Pure 2), and finally, Last Preservative. The first two steps are quite simple, but with the rate that the Last Preservative evaporates, I was wondering if anyone has any way of telling whether or not they've even treated an entire side of a record? Any advice or tips/tricks would be greatly appreciated. Thanks for your time.