Before you use a solvent make sure it isn't going to damage your gun, accessories or cause personal injury. These substances are typically flammable or easily combustible. If they are used for the wrong purpose or accidentally end up in certain components they can combust or cause an explosion. Some specific solvent uses and potential issues are described below. 

 GUN BORE CLEANER :  Standard bore cleaners are solvents used to clean steel and stainless-steel barrels. Patches or cleaning pellets lightly dampened with cleaner should be pushed or pulled through the barrel. Dry ones should be used to remove any remaining solvent. A light coat of oil should be applied after cleaning. These cleaners are typically corrosive to brass barrels and other parts made or plated with soft metals. Brass barrels should be cleaned with oil only. Bore cleaner in general is highly flammable, make sure it doesn't get into parts that will be exposed to high pressure other than the barrel and breech. Allow enough time for residual solvent to dry before oiling the barrel or using the gun.

 PENETRATING OILS :  WD-40 and similar penetrating oils tend to be highly flammable. These should not be used to lubricate any part of an airgun, tank, pump or introduced into any pressurized component. If used for external cleaning or to remove rust it should be thoroughly wiped off. These light oils and the additives in them are not good for preventing corrosion regardless of what it says on the can. Engine oil works better than all of them for wear and corrosion protection. 

ACETONE :  This is also known as nail polish remover and is commonly used to clean metal parts for touch-ups and refinishing. Many plastic parts, paints and coatings on airguns and accessories are easily dissolved with acetone. This applies to many Crosman plastic parts including grips, forearms and some of the adjustment marks and dots on sights. Acetone is highly flammable and the fumes are highly explosive.

 ISOPROPYL ALCOHOL :  Also known as rubbing alcohol it is commonly used to clean parts and remove oils and greases. It won't dissolve plastic parts but it is flammable and can produce explosive vapors.

 DISH SOAP :  This is an excellent parts degreaser and it's very inexpensive. It can be used undiluted or mixed with varying amounts of water to dissolve oil and grease and easily rinses clean. Steel parts should be dried thoroughly right away and oiled to prevent rust.