They can't repair it if it isn't broke. One more time, what you are seeing is normal. I have Fluke 87 meters which drift less an input and free cheap meters that do it. Sometimes they do and sometimes they don't. There is no rhyme or reasoning a pattern. What is important is the measure as they should when they should. Some tend to drift when open circuit more on AC than DC ranges, primarily voltage. Now if you want to send it back to somewhere then if it makes you feel better have at it.It just started doing this lately, usually it counts down to 0 but it seems to be holding at different readings.
I'm debating sending it in for repair but I might be better off to replace it.
in moist air it will count down to zero because the moisture is draining off electrostatic charges. it's winter, so generally in cold weather, the air is much drier, and doesn't bleed electrostatic charge as well as moist air.usually it counts down to 0 but it seems to be holding at different readings.