Hi there. I am a Forensic DNA Analyst. I have done thousands of samples similar to that in that they are considered 'touch' DNA. Often when someone touches an object they have DNA from nucleated cells from perspiration coming up thru the pores in the skin and can shed these DNA containing cells.
The outside of the skin (non nucleated epithelial cells ) do not have DNA, but if you have sweat, tears, mucous or some other body fluid on your hands you can spread DNA-containing cells (with nuceleus). It all depends what was on the hands. If they just washed them or had gloves on then it is unlikely. The only way to know is to measure or quantify the DNA. Hope that helps.
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