Toast button sticks and sometimes does not function. Sometimes it will work if it is jiggled.

I had the same problem which was getting worse. Eventually I took the oven apart by removing the feet, shell and front. Then I removed the circuit board on the front panel which has all the switches on it. We never use the "Defrost" function, so using a soldering iron, I swapped the "Toast" switch with the "Defrost" switch. The Toast function now works normally. I plan to get some spare switches for the next time one of these goes wrong. While I had one of them out I checked it out and a Panasonic P/N EVQ-PAE05R available from Digi-Key P/N P12192S-ND looks like it will do the trick.

I had a similar problem, but several of the buttons on my oven were sticking or had to be pressed several times to get them to work. I removed the circuit board, washed it with warm water and soap. Cleaned the panel where the buttons mount to the front of the oven with oven cleaner. Dried the circuit panel and cleaned the button switches with electrical contact cleaner. It now works like new again.