How do I know when its time to begin looking for a more qualified caregiver?

i have just hired a caregiver for my husband to help me out. we are both 76 and my husband had a bad stroke 11 years ago. he is paralyzed on his right side and cannot talk. he understands me i think. i hired the caregiver to help me get him up and dressed and fed in morning . she comes 3 hrs a day 7 days a week. this is helping me get out of my depression and i am beginning to feel better . my questiion now is i don't ever see the caregiver wash her hands before working with my husband? she comes over when she is sick? she isn't able to shave him? she is a very nice person b ut should i be looking for a more qualified person that could help him with some of his exercizes . i have asked her if she would work with him on some and she listens but i haven't seen her do anything yet.