So I made a really dumb mistake and forgot to inspect a funnel I used to put oil into my brand new Honda 2200i generator. After filling the oil tank I realized I had previously used the funnel to pour sand into a basketball hoop base. It wasn't enough where I obviously saw it when I first picked up the funnel, but after pulling a paper towel through the funnel I saw probably ~50-100 pieces of fine sand drop out.
I immediately drained the oil from the engine (never added gas).
Any ideas on 1) how worried I should be and 2) how I might be able to clean out the oil tank?