It gets my water bottles all gunky too. I have heard you can also try vinegar (1 tablespoon per gallon) and that should also break down urine before it turns to amonia.
I have a friend who swears by Grapefruit Seed extract. He says it helps with both urine and mouse musk smells. I haven't gotten a chance to try it yet because I need to get the dilution ratio from him. BTW - He says it's also good for their digestion.
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Anna
The Zoo
Corns
1.0 Snow - Cornelius
1.1 Ghost(pastel) - Eek & Boo
1.1 Amel - Parker & Scarlet
0.1 Hypo - Nikko
0.1 Anery - Missy
0.1 Hypo Motley - Cordelia aka Cordy
Boas
0.1 Columbian (BCC) - Bella
Lizards
1.0 Leopard Gecko - Leo
Rats
0.1 Dumbo Agouti - Moon
1.0 Silvered Black - Pluto
1.0 Powder Blue - Corner
Plus the breeders
Cats
1.1 Siamese - Blue & Fiona
0.1 Gray DMS - Druscilla aka Dru
Horses
1.0 Thourghbred (Hunter/Jumper) - Morgan's Majesty aka Cody