Here is an excerpt from a very good
article at DAN
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Make Your Own 'Home Brew' [/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif]So what's all this leading up to? You can make your own "home brew" to prevent ear infection, as many of our members have shared with us to share with you. [/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif]White wine vinegar is 4-6 percent acetic acid, and if it is mixed with an equal amount of isopropyl alcohol, it would probably work fine. Using undiluted vinegar may make the solution too acidic and cause irritation. Using less alcohol may be wise if you find that the 50:50 mix provides too much drying. Too much drying can make your ear canal a bit sore after several days of use. [/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif]In principle, just diluting the acetic acid 50:50 with water might work since it appears that the acidic pH is more important than the drying effect of the alcohol. Adding propylene glycol or other moisturizers would seem either to be a waste of time in a home brew, or it might produce undesirable effects according to Dr. Jones' observations. [/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif]Terence M. Davidson, M.D., the Director of the Nasal Dysfunction Clinic at the University of California, San Diego, recommends another mixture with acetic acid (vinegar) using 1 part water, 1 part white table vinegar (approximately 5 percent acetic acid) and 1 part rubbing alcohol (70 percent isopropyl alcohol). "This works well, but smells like vinegar, so that most people prefer the Domeboro Otic," he noted. [/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif]Another option is using Burrow's solution or Burrow's tablets, which can be purchased as an over-the-counter medication. You can make can make Domeboro Otic by mixing 1 part Burrow's solution with 1 part water and 1 part 70 percent isopropyl alcohol, Dr. Davidson noted. [/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif]Could lemon juice, which contains citric acid instead of acetic acid, be used instead of vinegar, as some members have advised? In principle, if a solution was mixed to a pH of 3.0 it might, but whether other substances in lemon juice might promote bacterial growth is uncertain. For home brew, stick to what works: vinegar and isopropyl alcohol. [/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif]No matter what solution you use, remember its effectiveness is drastically reduced unless it remains in the ear canal a full five minutes. Another caution: The above solutions are for use in the otherwise normal ear with an intact eardrum. If there is any hint that the eardrum may be torn, do not use these solutions as they may cause damage to middle ear structures. And if any solution causes irritation, stop using it. [/FONT]