I was changing a bad spark plug on my F150 4.6L V8 and despite cleaning the spark plug well as thoroughly as I could muster (rearmost cylinder and under the dash pretty well so very little clearance) I can't guarantee a bit of the residual dirt from the well didn't make it into the cylinder. For a bit more context, getting the new plug lined up took a couple attempts and each time the anti-seize had to be cleaned off and re-applied due to sediment sticking to it, not a whole lot but more than I really wanted to risk with the soft aluminium heads on these engines.
What are the risks of starting the engine at this point if some sediment did make its way into the cylinder. Will it just get blown out pretty well right off or will I be risking damage to the sleeve or valves (or anything else further down the line). Would I be further ahead to remove the spark plug and try to sneak a line down into the cylinder and try to blow anything out (keeping in mind that may introduce new contaminants)?