Ignore Cleverclogs, he/she/it is just a petty malicious troll, who seeks to provoke a hostile response by writing inane drivel. The best response is not to respond at all and ignore it. Most trolls hate being ignored.

In some cases, reproducing experimental data can be troublesome, especially if the experiments are very sensitive to 'micro conditions' such as minor variations in temperature, humidity, pressure etc. Minor variations in technique from researcher to researcher can also result in data not being easily reproducible. I would not worry too much unless you fabricated the results, which I am pretty sure you did not.