oven cleaner residue

When we moved into our home (last October)I sprayed oven cleaner (Mr. Muscle) into our oven and broiler and left it to soak (the house was a repo and the stove was a real mess). My wife cleaned out the oven, but did not know that I had also sprayed cleaner into the broiler. Consequently, we have been using the oven for the past 6 months with the cleaner still in the broiler. Should we be concerned about health effects?