After a bit of lapse, I decided to try an exercise with random numbers on the street (license plates in particular) to come up with images for them. One of these numbers was 7582 from a license plate. In a complete and sudden spell of forgetfulness, I thought of 75 and could not recall what my image was. I had to think “7 = k/g, 5 = l, kl, call, coal, coil, ah, it was coil!” and “8 = f/v, 2 = n, fn, fan, van, fine, vine, VINE!”. I then recalled a coil wrapping around the car turning into vines as it did so - coil vine = 7582.
Earlier, I could do this near automatically, but with time, I seem to have forgotten some of my images. Is this normal? Should I replace them or just use the old ones I had forgotten?