The only way to clean carbs is to take them completely apart and make sure all of the passages are clean.
That said, 2 1/2 weeks should not be enough to gum up the carbs but you could have some kind of contamination (dirt) blocking passages in the carbs. Other things I would look at before ripping into the carbs are...make sure the tank and float bowls are properly vented, drain the float bowls into a clear container to see if you have water contamination, check for air leaks, and inspect the air filter.
Rarely is the question stupid, but sometimes the answer is
you need to run everything you read online through your own personal BS meter to determine if it makes sense to you.