Worked great in an older keurig model!

Our keurig started acting funny a couple weeks ago, wasnt brewing coffee properly and sometimes not at all. Tried the hot water and vinegar route, it helped but still wasn't back to normal. Gave these a try, they arrived today, used one of the 2 descaling bottles right away, and what a difference! Its actually back to normal, not making a mess and even sounds better. It seemed to be struggling to run and heat up before, but since using the descaler, its running smoothly like it should. I admit the smell turned me off while 'brewing' the descaler, more than the vinegar smell, but it does work. Did a few water only brewing rinces, and rinced the water jug part well before making the first cup of coffee. No after taste or smell that I can find! Saved our Keurig machine, and our money! The second bottle will be handy for next time!