possibly. i live in Hawaii but even at my old house it gets super dusty. Never got to the point where i needed to change it though the PC just got so old that i would eventually just build a new one at that point. 5 years in though is meh for my PCs.
at the point where i just want to build a new one but aint got the money for that; currently saving for a new car which is more needed.
i was at the store yesterday tryna look for thermal paste/spray to clean out the case but sadly none of the stores had any. not surprised like i said we got very limited stuff when it comes to PC parts here. 1 shop but everything overpriced would be cheaper just to buy online and get it shipped for free.