A smart thing to do is carry a battery booster in your trunk. It gives you extra power for that first start of the day. I live in SE Wisconsin and ysterday morning was tough. I plugged it in last night and this morning was fine.
If you must use ethyr DO NOT remove air cleaner and spray it down the air intake. Instead a VERT SHORT shot up the plastic hose is it. The ethyr will slowly go through the air filter and help it start. Doing this daily is not acceptable. An emergency start to avoid a tow is more like it.

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1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
2006 CDI Handed down to daughter
2007 GL CDI. Wifes