And if it is to be taken out at night, how long should you wait after having stretched up a size?
Would it ever be possible for the holes to shrink/close up overnight ? I can't imagine so, but still believe I have read about it somewhere....

Good idea, cos I was thinking it must be good to give my ears a break + a bit of breathing time during the night...corazon_de_oro wrote:I leave mine in at night, but if you are able to leave it out it's a really good thing to do. If you want you can test it out; try leaving them out for a while during the day to see how long you can. Leave them out for longer and longer each day until it's the same amount of time you sleep so you'll know they won't close up too much.