Missus works in a chemist, sells finish tabs there but no discount or would've went with those. If I see finish tabs for $0.15 each I'll grab some to try. Will likely give the powder a go at some point. How much do you use and where do you put it? In the little thingo on the door or? No manual in the cupboard for it. Might have to pull it out and get the model # so I can get the manual.