Is this them?
The first rule of control is 'identification'
Without posting exactly what the beetle is, nobody can help you.
Next step of control is "knowing the lifecylce", and where you plant to target the control measure.
BAYGON
Is only a trade name for a group of chemicals...... each with different active ingredients.
These are usually synthetic pyrethroids, whereas a qualified exterminator is most likely going to have far superior chemistry, and know how and where to best place it to cause them miminum impact on yourself and your family.
To me, it sounds like these 'bread beetles' have moved from "cereal based products" (rice, grains, museli, pasta, etc.) that you have stored.
I would first pull these out and see if you can find traces of the beetles there.
Any trace........ throw it ALL away.
Look behind the fridge and dishwashing machine if possible. Focus on the kitchen where the foodstuffs are stored.
If you want to just use a 'surface spray' while you are at it...... insects like cockroaches tend to track around the edges, so laying down a quick spray along the corners may help a bit...... but not likely.
Again,
we need to know exactly what it is.
Then what stage in the life cycle to target.
Next, is if you even HAVE access to the chemistry you require.