Finger swipe laptop won't recognise

[WendyS]

My new fingerprint laptop continually refuses to recognise my right index finger swipe despite the computer having confirmed it as a perfect match. It usually recognises my left index finger only after several swipes. Can anybody suggest what is causing this? Have my fingerprints been eroded away after years of keyboarding?

[sarnieken]

it could be dirt on the scanner. Try using a swab / cotton bud with a little cleaning alcohol to get rid of the grease and bits that can build up.

[WendyS]

Thanks. Have tried this but it will won't recognise my right index finger at all , but eventually rcognises my left one after a few attempts. Am totally baffled. Know several other people with laptops of this type, none of whom have had any difficulties.