Check the Fit Before Adding Glue
Before applying glue, make sure the loose part is facing the correct direction and sitting in the intended slot or joint. A piece can feel wobbly if it is slightly misaligned, reversed, or not fully seated.

Building things to life
Loose or wobbly parts can happen when a wooden joint, slot, tab, or decorative piece does not fit as tightly as expected. In many cases, you can fix the issue by checking alignment, adding a tiny amount of glue in a hidden area, and holding the part steady while it sets. The goal is to strengthen the joint without making the finished model look messy.
Before applying glue, make sure the loose part is facing the correct direction and sitting in the intended slot or joint. A piece can feel wobbly if it is slightly misaligned, reversed, or not fully seated.
If the joint is still loose, apply only a tiny amount of glue to the least visible contact point. For small joints, a toothpick, fine applicator, or needle tip gives better control than squeezing glue directly from the bottle.
After applying glue, check the joint immediately. If glue squeezes out, use a cotton swab, toothpick, or scrap paper edge to lift it away before it dries. Try not to smear glue across the surface.
A repaired joint can become loose again if it moves before the glue sets. Hold the part in position, or use low-tack tape, a small support, or a magnetic clip to keep the piece steady while the adhesive begins to grip.
Do not fill the joint with too much glue or force extra material into the slot. This can make nearby parts harder to fit and may create visible marks. Reinforce the joint just enough to stop the wobble.