Another factor to consider …
is the fact that they do not generate bugs despite being sugar. So it is possible to keep them for years. In my case, I have kept some for more than 3 years. Although I have to say that they are not like the first day.
Over time, they are very likely to get dirty. To avoid this, it is best to keep them in a glass case, whenever possible. Another option is a box or wrap them with plastic wrap.
But why to do it? Can’t we clean them with a damp cloth? Personally, I do not recommend it, since the water spoils the figure generating stains and in many cases, we cannot remove the dust.
I hope these tips have been useful to you.