batsbrew
i use 1 cup cold water from the tap.
never from the britta, that can kill them.
1/4 cup white sugar.
bring to boil for 2 minutes.
let cool.
slurp.
Yep, pretty much the same except I've got three measuring cups that are ONLY for use with the feeders (two 16 oz. and one 32 oz.) so that way they never get other substances in them. They only get washed in hot water as well - nothing else.
Since each of the measuring cups has metric on one side, I put sugar in up to the 100ml line (or the 200ml line on the 32 oz. cup), then add water to the top of the 500ml (or 1liter) lines. Then into the microwave for three minutes (for the smaller cups, six for the larger), let cool and pour into the feeders - after cleaning each with only hot water and the occasional paper towel wipe inside.
I had a tenant who didn't follow some part of this and he didn't get a single visitor at his feeder (he resented ME for that - figures).