Construction toys are handled constantly, dropped on floors, carried around houses and occasionally mouthed by younger siblings. They need cleaning periodically, and the method depends on the material.
When It Matters
Routine cleaning is worth doing after illness in the household, before passing a set to another child, after buying second-hand, and periodically for anything used by very young children.
In a nursery or shared setting the requirements are stricter and generally specified by the setting’s own procedures.
Plastic Parts
Warm water with a little washing-up liquid handles almost everything. A mesh laundry bag or a colander makes washing a large quantity manageable, since the alternative is losing pieces down a drain.
Drying is the step that matters. Anything hollow traps water, and parts put away damp develop a musty smell and, in the worst cases, mould inside. Spread them on a towel and leave them considerably longer than seems necessary.
Systems with simple solid parts and no hollow cavities, such as tinkertoys, are considerably easier to dry properly than sets with enclosed components.
What to Avoid
- Dishwashers, where heat can warp plastic and detergent dulls surfaces
- Very hot water, which softens some plastics
- Bleach and strong disinfectants, which discolour and leave residue
- Abrasive cleaners, which scratch printed graphics permanently
- Soaking anything wooden, which raises the grain and loosens joints
Wooden Components
Wipe rather than immerse. Wood absorbs water, swells and then does not return to its original dimensions, which for a construction system means connections that no longer fit properly.
A damp cloth and immediate drying is the whole method. For anything requiring more, a very slightly damp cloth with a little soap, wiped over rather than scrubbed.
Printed Tins and Containers
Retro-style tins and printed containers should be wiped with a barely damp cloth. Water sitting in seams causes rust from the inside, which is how most printed tins eventually fail.
Abrasives remove the printing, which is frequently the most valuable part of the container.
Checking Condition
Cleaning is a natural point to inspect. Cracked parts do not grip properly and are frustrating rather than dangerous, though a split plastic component can present a sharp edge.
Discard anything genuinely broken rather than returning it to the box, since it will be picked up repeatedly and fail every time.
Storage After Cleaning
Completely dry, in the set’s own container, somewhere with a stable temperature. Lofts and garages are poor choices: temperature swings cause condensation, damp affects wood and prolonged cold makes some plastics brittle.
An indoor cupboard is considerably better even where the temperature is similar, because the humidity is stable.
Frequency
For a set in daily use by one household, a proper wash once or twice a year is reasonable, alongside a wipe of anything visibly dirty as needed.
Doing it at the same time as a general toy review, when everything is out anyway, makes it likely to actually happen.