Brown tips and leaves

It can be possible that leaf tips of your plants dry up a little,
once forgot to water or a particularly hot day with drafts and direct sun and it happened. To let the plants remain respectable you can trim the tips with some clean scissors and your Air Plants instantly will look fresh and vital again. But please do not overdo it. Best to cut diagonally so it looks more natural and does not stand out at all. 
Fitting scissors are of course available here in the store.