Dewed up optics is the first big guess (post #15 "I live on a lake").
Trying to focus too closely is the second guess.
Gross rotational errors of the secondary is the third guess.
The zeroth guess is obviously take the clear cap off the eyepieces! (yes I was laughing because I too am an idiot)
1 and 2 are easy to fix. Don't guess on 1, check it (#10), both primary and secondary, then all your eyepieces.. If the Moon fits in your widest eyepiece, it should be getting either bigger or smaller as you rack from all in to all out (hopefully smaller from all in to focus in the middle to bigger past that). It should work at some point because of "stopped focusing" (#1). If you needed extension tubes before, put them in. If you can't fit the moon, use you highest power eyepiece and Vega or Arcturus.
Three is the most guessy part of collimation. See post #14 here. Sight tube, laser (that is itself collimated in a focuser that is aligned well), sight tube again, then autocollimator are the best ways to get both collimation of the elements with respect to each other, and alignment with the physical axis of the tube and focuser. The focuser alignment is good enough becuase it worked at some point. If this works, then turn evey knob randomly, then get more practice.
These are all big guesses. Describe what image you see and how it changes as you rack in and out, and what you're pointing at. With the eyepiece out (and a sight tube in so that your eye is centered in the focuser), sketch all the circles, parts of circles, and ellipses you see and describe them (or show the sketch).