I haven't diluted the solution, so I can't really suggest a dilution ratio, if that's what you are asking. The solution comes in a spray bottle, so I just use a couple of squirts (3 or 4) on my tube feeder and little my window feeder, both of which we fill only with black oil sunflower chips (which can quickly cloud up your feeder). In the tube feeder, I use a bottle brush to distribute the cleaner over the inside. I leave the solution on the feeders for a couple of minutes and then hose it off. As long as I do this every few weeks, I don't really need to "scrub" the feeders; the oil, dirt and grime just rinses right off. If you have an older, grimy feeder that has never been cleaned, give it a good scrub after letting the solution sit for a few minutes, and then repeat to get any left-over residue.