there is Lazzer tire shop in karama, show them your tires. these guys are very honest and will give you best advise. according to me they may be very old tires that need replacement. even if you dont see any damage to the tires the air is leaking form somewhere.
all the best
what should be the ideal tier pressure used for this car as i have just got new tiers and i am not really confident in driving and they feel a bit bloated.