General cares – store in a safe place, do not leave on floor or on a chair, and use suitable (and closed) case;
Essential part of the failures instruments happen by accident. Some common things that should be avoided are: release of a violin or leaving a chair on the floor in an open case (chin rest on especially with chin rest on it) within the reach of small children, or any other precarious position. Jewelry, watches, bracelets, dangling earrings, jacket or shirt buttons and zippers often lead to unexpected scratches, bumps and dents.
If you use a chin rest on, remove it before returning to the violin in its case. The remaining chin rest on might stick or do other damage if inadvertently the case is closed. Also, be careful if you the tire of the metal legs of chin rest were removed, it can damage the varnish.
If you own expensive or valuable instrument, certainly, invest in an appropriate case, it will save you future problems.
Season cares – store at room temperature, do not expose Instrument to sunlight, store at moderate humidity (50-60%).
Changes in temperature and humidity make instruments and hair bow to expand and contract, which can lead to open agglutinations in more problematic areas (more likely to occur in high humidity) as cracks in the long term, or non-focused sound in the short term. Try to keep your instrument at room temperature when possible.
If a problem occurs, the reason is that the glue which holds Instrument is water-soluble, and exposed to excessive humidity one of agglutinations not endure the pressure of the strings. If your instrument is ungluing or break, loosen the strings and must be repaired immediately to prevent further spread of ungluing (never try to gluing it yourself). Do not touch the crack because the fat in your skin will contaminate the wood and reduce the binding capacity of the glue that will reduce the ability to make invisible repairs. Re-gluing of cracks is a fairly simple procedure that involves washing the old glue and re-gluing, and should always be done by a professional.
A common problem is the fall or tightening of the pegs. The reason is also in expansion and contraction of the wood related with change in temperature and humidity. In both cases, what should be done is to adjust winding the strings in the keys to the new situation. Dropping the keys not retighten because this will damage the box of pegs and will lead to repairs that are more serious. Wind the string again as described in topic Pegs and this will stabilize the situation to the next more significant climate change.
In general, do not leave your instrument in areas where seasonal differences in temperature and humidity is more pronounced.