[DKAudio]

I want to put down ceramic tile in the kitchen, bath, and front entry. Right now the kitchen and bath have an old vinyl tile. I think it was before the self stick because I pulled up a tile and there is a spread adhesive on the plywood beneath. Can I leave this or do I need to get it all off and clean? It is very sticky and stuborn. If I need to clean it how would I do it? I can use the plywood as a base, correct?

I found some tutorials online but if you know a good one please post it.

Thanks