I cleaned my Kenmore self cleaning gas oven for 3 hours. I went to open the lock and it took more effort than normal. I got the level to the off position but the oven door will only open about 3/4". Now the locking lever will only move half way towards the "lock" position for cleaning. I can't open my oven door and I can't return the lever to clean. Does anyone know how I can resolve my problem?