Glitch problem

[spongebob]

Hi friends I have a problem with my toy (it's aa old talking Naval Battle).there are not interesting bends:one is a disguised voice;then there are many points that cause glitch .but the problem is that glitches not always work.only when I touch lightly these points. How can I solve this problem? Maybe with Resistence? or capacitors?

[catweazle]

Hi,

you should use a potentiometer (470kOhm linear) to find out which value works best, then you can solder a resistor with a body contact.

Try to lower the input voltage (variable power supply) so that the thing is at a point where it begins to work, sometimes wired things happen.