Mother has dementia, fully-dependent, and has caught a cold. how do i influence her to cough up mucus since she's forgot?

Dementia: I'm sorry to hear about your mom's dementia. As memory loss progresses, our patients won't understand even simple requests/commands. You can offer a mucolytic like guaifenesin to "thin out" thick mucus but staying hydrated is important too. At some point, difficulty swallowing & forgetting to cough can increase risk for aspiration pneumonia whereby solids & liquids go into lungs rather than stomac