dust behind all-in-one screen, how to remove?

hi everybody,

i have just purchased an asus all in one pc ET2221IUTH, with touch screen.

there is a small particle of dust on the internal side of the screen. no led fault or other, just a small particle.

on imac, for example, the front glass could be easily removed and cleaned. do you if it is possible doing this operation on this model with touch screen?

thank you