Suitable cleaning agents include alcohols, such as ethanol and butanol, mono and di-alkyl ethers of alkaline glycols including propylene glycol alkyl ethers such as monomethyl ether and dimethyl ether, and hydrocarbon cleaning agents such as pinene and/or camphene, terpinene, limonene, terpinolene, terpineol, linaleol, and other related members of the terpene family.