Does anyone know why my Lego set is chipping into small pieces

I have had this Lego set for less then a year ago. And a couple weeks ago I moved it .and started to chip and any time I try to fix it. It gets worse it has never been in the sun either. Edit: it is mostly likely from my perfumes and candles. and yes my Lego set is kinda dusty I know that 😭 I have pets so it’s builds up fast submitted by /u/Repulsive_Star_9166 [link] [comments]