It is within your rights to refuse the test and ask for a Breathalyzer.
Shit, wish I'd known, would have been much faster.
*Suspected drink driving stop in the UK, in the middle of freezing cold winter night*
Tap tap on window.
"Can you roll your window down please, sir?"
"Sure" *whirrrr*
"Have you been drinking sir?"
"Nope"
"Do you mind blowing into this, sir?"
"Nope"
(crackle, pop, blow, ding!)
"Blew a green sir. Have a safe drive."
"Thanks, bye"
(Leave)
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*Suspected drink driving stop in the California, in the middle of freezing cold winter night*
"Step out of the car please, sir"
"Oh, ok"
*is very nervous standing on the side of 101 at 2am as cars occasionally target-fixate and only 'break off' at the last moment.*
"Have you been drinking sir?"
"Nope"
"Going a bit fast weren't you?"
"Yes, just want to go home. Long night"
"Can you just, stand on your head, touch your hands to your nose, walk in a straight line, count backwards from 100, say the alphabet forwards, then backwards, then do the hokey cokey and shake it all about please, sir?"
"Sure"
(5 freezing, scary minutes later as actual drunks swerve about in the darkness at 80mph).
"Looks like you weren't lying about not drinking. Keep the speed below 75, even at this time of night"
"Sure thing, thanks"
(Wait 5 mins before hands and feet are warm enough to operate controls again)