Script eating memory by the hour...?!

Hi, I've got a autoit script on my server that checks a lot of services (windows 7). But it eats memory, a lot. After about an hour I need to restart the script. I'm sure it's pretty easy, but I can't really see the problem here ^^

$servicename = "Example"
$stdout = Run('sc.exe query ' & $servicename, '', @SW_HIDE, 2)
	Local $data
	While 1
		$data = StdOutRead($stdout)
		If @error Then Return 'unknown'
		If $data Then
			If StringInStr($data, 'Running') Then $data = 'Running'
			If StringInStr($data, 'Stopped') Then $data = 'Stopped'
		   ExitLoop
		EndIf
	 WEnd

Anyone got a hint?