If you have an enclosed heating element, then it is ok on the bottom (nothing gets melted when it is enclosed I can vouch for that
) I love the dishwasher goo but my dishwasher doesn't so we have to alternate. My dishwasher is very sensitive (NEVER recommend it
) and if I do too many goo loads in succession it has a hissy fit and claims that it is blocked up and dirty and won't work (actually is a service call to get fixed
but I have a fantastic service man who showed me how to fix it lol) still very annoying