I have had contact lens for almost a year. I have an one-day-use disposable contact lens in an unopened package. I also have several unopened packages of contact lens that can be used for a week (I think, not sure). Is it safe to use them now, if I've had them since mid-2005? I also have hair gel in an opened bottle. I use it rarely but when I do, I'm not sure if it's harmful to me or anything, because the gel seems the same as before. I've had this bottle for about 3-4 years now. Simplified, is it still SAFE to use these products after sitting for so long? Thanks.