On way into work today, I saw some people setting up for a garage sale. I stop and asked if they minded if I looked while they were setting up. I came across a HP 28C calculator that was for sale. It was marked $30. I tried to turn it on, but it did not come on right away. I fiddled with it a bit and it finally came on with the message Memory Lost. I ask the guy if he would sell it for $15, and he said sure because it only worked some of the time. I took the batteries out and I saw why it only worked some of the time as there was white powder on battery from some corrosion. I figure I could fix it.
Since battery compartment is strange for the 28C, what is the best way to get the corrosion out of there. I would think that a paste of baking soda and water would help neutralize the buildup, but moisture may get into case of calculator, and I don't think that would be a good thing.
Has anyone dealt with this before, and if so, how.