The answer depends on the lock, the product, and the condition being addressed. A general-purpose spray is not a universal repair for a lock cylinder.
Do not force a key or keep adding product when a lock’s behavior is changing.
Why a quick spray may not solve the problem
Resistance can come from key wear, internal wear, contamination, door alignment, temperature, or damaged hardware. Lubrication cannot correct every cause.
Follow the lock or hardware guidance
Use the product and method recommended for the specific lock when that information is available. Excess product can attract debris or spread into areas where it is not useful.
Stop when the condition is getting worse
If the key bends, catches, or requires increasing force, stop before it breaks. A service call may prevent a more difficult failure.
When to call for service
Call 813-968-4999 for lock-service questions. For business properties, use the Commercial Locksmith page.