Once the fire is put out, damage must be assessed to see what areas were affected. Sometimes, at first glance, you think a room did not suffer any damages at all.
Smoke is a byproduct of the fire, and it gets into just about everything. It's found in drawers, cabinets, wall cavities, etc. It doesn't need much room to creep into any crevice.
SERVPRO Bedford Park / Burbank has ways to determine where the smoke traveled. In the photo, you see a sponge, specifically designed to attract smoke particles. Though the counter looked clean, you see smoke the sponge found.
If you suspect you have smoke damage, call the experts at SERVPRO Bedford Park / Burbank at 708-430-3600.