Don’t try DIY stuff as it may damage your teeth. A good electric toothbrush and salt can get rid of staining. Talk to your dentist about professional whitening but be prepared for expense and pain - the whitening system can be very painful on sensitive teeth. I did it all about 8 years ago (oh vanity!) and it was worth it for me then, but not sure I’d do it again !
BBC Radio 4Extra Scheduling Shake-Up.