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Defrosting Your Windshield Incorrectly Can Lead to Cracks

A Safelite Autoglass tech says that about 3 of every 10 windshield he fixes, were damages due to temperature changes.

Posted: Jan 22, 2019 9:50 AM
Updated: Jan 22, 2019 9:50 AM

MEDFORD, Ore.-You can expect freezing fog in the mornings around the Rogue Valley for the rest of the week. You may want to give yourself a little bit of extra time in morning as you head out the door to scrape the ice off of your windshield.

Safelite Autoglass tech, Aaron Kimling, says that using your defroster to melt ice can actually end up cracking your windshield. He has been repairing and replacing windshields for 4 years.

"A simple analogy for that is you're taking a hot coffee pot and putting it in cold water. That coffee pot is going to explode. Glass is no different. It's cold outside, you turn on your heater, and that heat from the inside is going to heat up that windshield really really quickly causing it to crack out," says Kimling.

He says that this is most likely to happen if you already have an imperfection on your windshield. A rock chip or crack can be so small, you might not even notice it's there. When you use your defroster to melt ice, the rapid temperature change from cold to hot can expand a crack.

Instead of using your defroster, Kimling recommends you use a de-icing spray or a regulations ice scraper. A regulations ice scraper is one that you get from the store for the specific purpose of scraping ice. You can get both of these from an auto parts store.

"Don't use CD cases, don't use your cell phone case. Don't use anything other than that. Odds are, you're going to scratch your windshield because of the dirt from the previous days drive...things of that nature. You don't want to scratch your windshield."

Kimling told me he's seen a lot of scratched and scraped windshields after people tried to use something other than an ice scraper.

A de-icing spray is just made with just a couple simple ingredients and it's easy to make at home.

"If you are industrious like many, you can create your own and it's super simple. Just 2/3 rubbing alcohol and one part water. So 2 parts rubbing alcohol, one part water, spray it on there, give it a second, you're good to go," says Kimling.

Oregon Coronavirus Cases

Data is updated nightly.

Cases: 387485

Reported Deaths: 5116
CountyCasesDeaths
Multnomah59768836
Washington41571393
Marion39592504
Clackamas32426376
Lane29856354
Jackson24672350
Deschutes23182185
Umatilla15087180
Linn14488178
Douglas13236286
Josephine10057240
Yamhill9665142
Klamath8979145
Polk813698
Benton605137
Malheur591586
Coos5573106
Columbia423855
Jefferson416865
Lincoln357252
Union336854
Crook330156
Wasco314846
Clatsop258335
Baker217531
Tillamook214345
Hood River211337
Morrow197025
Curry190136
Harney119332
Grant108314
Lake104016
Wallowa74713
Sherman1903
Gilliam1844
Wheeler1141
Unassigned00

California Coronavirus Cases

Data is updated nightly.

Cases: 5060666

Reported Deaths: 74152
CountyCasesDeaths
Los Angeles152491227121
San Diego4047084319
Riverside3849455306
San Bernardino3718825944
Orange3329505675
Sacramento1674002423
Kern1565171781
Fresno1558992246
Santa Clara1511691922
Alameda1246581504
San Joaquin1070001833
Ventura1036461188
Contra Costa1032921045
Stanislaus912991413
Tulare856141082
San Francisco56614669
San Mateo56058629
Monterey52340625
Solano47422356
Santa Barbara47035548
Merced44807664
Sonoma42912412
Placer41881468
Imperial38128769
Kings35038358
San Luis Obispo31294358
Madera26005311
Shasta25917440
Butte25295309
Santa Cruz22028222
Yolo21451257
Marin18342248
El Dorado18166161
Sutter14494181
Napa13372104
Yuba1070088
Tehama10230129
Humboldt10043117
Nevada9914103
Mendocino848894
Lassen792355
San Benito775977
Tuolumne767790
Lake6990110
Amador573766
Siskiyou470954
Glenn455136
Calaveras435685
Del Norte371242
Colusa323519
Inyo254345
Plumas19127
Mono18294
Mariposa156718
Trinity98817
Modoc7475
Unassigned2430
Sierra2170
Alpine1060
Out of CA00
Medford
Mostly Cloudy
49° wxIcon
Hi: 53° Lo: 43°
Feels Like: 49°
Brookings
Partly Cloudy
46° wxIcon
Hi: 58° Lo: 47°
Feels Like: 46°
Crater Lake
Partly Cloudy
49° wxIcon
Hi: 46° Lo: 29°
Feels Like: 49°
Grants Pass
Cloudy
49° wxIcon
Hi: 53° Lo: 44°
Feels Like: 49°
Klamath Falls
Partly Cloudy
27° wxIcon
Hi: 56° Lo: 31°
Feels Like: 27°
Fog and stagnant air in the valleys, dry and mild weather continues into Monday
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