Tilex: does it lose its power after time?

The Tilex site say's it loses power after 1 year. I found another site that says spills less than 5 gals can be flushed down drain (in Ohio). If it's over 1 year I'd just toss it in the trash if it's not working for you. If you're really concerned call your local landfill and/or waste water department. They may know. BTW: I've wondered about Tilex losing it's strength too.

I've don't use it anymore. Good grout sealer and silicone caulk seem to do the trick for me.

Tilex is pretty much just dilute chlorine which is unstable and will weaken as you described. Just dump it and add some chlorine bleach and water to the spray bottle and get the same results.

Pour it down the sink (there is less chlorine bleach in there than a load of clothes if it was new) and throw the bottle in the recycle.

That's pretty much true. I don't know the exact ingredients but Clorox say it's bleach and detergent which is the same thing that gets dumped in the drain in mass quantities daily. Another thing is, if the product is used as intended that's where it's going eventually anyway.

It can lose strength over that time. I'd just dump it down the drain.

Dump it in a load of "whites" that you would normally bleach and run the load as usual.

Lower it gently into your trash can.