hi... i have an unusual problem. came across a printing outlet that has 4 LG 24000 Btu split wall aircons. the aircons are just an year old, and has cracks in the drip tray's and even in the main plastic frame.it keeps dripping in several places. the plastic casing is not brittle, but just keeps cracking where the slightest pressure is applied.apart from paint and general stuff used for printing they also use a ROYSE refrigeration circulating unit that uses alcohol. has anyone encountered a problem as this , or any idea whats causing the damage. and if its just the chemicals , is there any special coating to prevent further damage.