catnip

Thanks, I will try IPA. In the meantime I have just sprayed it with dry shampoo, which has improved it greatly.

No the stairs have been in for 20 years. Diamond glaze was done 10 years ago so is probably a bit worn by now. The grease came from child eating sandwiches on the stairs !!!. (not mine). Thanks anyway

There are grease stains on my oak stairs (which have been sealed with diamond glaze in the past). I have tried de-greasing sprays, washing up liquid, salt, etc but to no avail. Any suggestions would be gratefully receive.