Being forgetful is a thing I am most famous for. Everyone that knows me knows that I forget things all the time. But the one thing that I usually never forget is when to change the air filter to my central heating and air conditioning system unit! However, there is a first time for everything. It finally happened last month where it was time to change the air filter to my central heating and air conditioning system and I totally forgot! It was when I started having allergy symptoms and coughing and sneezing a lot when the air quality outside was not bad that I knew something was up. That was when I remembered finally that I did not change the air filter of my central heating and air conditioning system! I could not believe it! I sincerely and truly could not believe it! I really forgot to change the air filter of my central heating and air conditioning system unit! So right away I got on it and changed the air filter. The old air filter was more filthy than I ever have seen in my life. And all of that was getting into the air quality of my home. I had to actually go out and buy one of those portable air purification systems in order to clean the bad air quality that the central heating and air conditioning system was giving me from not changing the air filter! I will make sure I never make this mistake again and always remember to change that air filter!