Does anyone know the shelf-life of OxineAH? I bought a gallon 4-5 years ago, and just now went to make up the diluted solution to spray my coop before putting new chicks out there. The stock is pale yellow, and there is no odor, either the stock solution or the diluted solution. I used it to spray the coop and maybe I will be able to tell if it did anything in the morning, because last time I used it I remember that it killed all the plant life it touched. I can't remember if it should have a smell or not. If it should, or if any of you know that it is past its shelf-life, I will order more tonight. Thanks.