I am still on my first one and I think it is about 9 yrs old. I have used the Lyra SPT and it finally is gone so I now have bought the MoFi as it was highly recommended when I was placing an order for another bottle of Lyra. So with 2 bottles of cleaner and both about the same size. Well to put it in real life terms. I am willing them both to MoFi upon my demise. But he must promise to not allow any "crud" to develope. Gee Brad shake it once and a while.
Take it from KC and the Sunshine Band "Shake Shake Shake...Shake Shake Shake your bottle!!"