Kosher

I have an uncle and aunt I haven’t seen in many years. They invited me to spend the holidays with them. I want to see them, but I am concerned about their kashrus practices. They claim to keep kosher and be affiliated with Chabad, but they admit they do not tovel their dishes because they are too busy to do so. Is it a problem to eat in their household off dishes that have not undergone tevila?

Dear Rabbi, What is the reason and benefit of keeping kosher? Thanks

Hi, We went away for the weekend and ordered a brand new crockpot, we filled it with chulent and its right now cooking. We forgot to toivel it, can we eat it?

if non kosher food touches plastic and then i touch that same plastic once the non kosher food is off, do i need to wash my hands before eating kosher food